Dr. Costella’s Mathematics Notes

This page contains scans of all 823 overhead transparencies that I created when I was a high school mathematics teacher in Melbourne, Australia, from 1997 to 2006.

The pages are numbered in the order that I created them, and so represent a mixture of topics from Year 8 to Year 12 level. I actually wrote each number on the bottom corner of each transparency, which let me figure out where to find each of them (stored in a number of pocket binders with plastic sleeves). I added letters (‘a’, ‘b’, etc.) when I found that I needed to cut a transparency into parts, so that I could use just a part of it (one subtopic) in a course different from the one that it was originally created for.

Hence, the only way to find any particular topic is to search for it on this page! Sorry. (When I was teaching, I would create a page for each module of work for each subject, which linked to these notes in the correct order.)

Anything in a title between square brackets was added at the time that I compiled this collection page, and represents text not in the title of the overhead transparency itself.

001: Intercepts of graph
002a: Intercepts of a linear grap
002b: Drawing the [linear] graph from the intercept
003a: Transformations of sine graphs
003b: Transformation [of sine graphs] in the vertical direction
003c: Horizontal compression [of sine graphs]
004: Vertical expansion of sine graph
005: Probability (Chance) [introduction]
006: Parabolas: inversion [cup/hat intro]
007: Stratified samples [construction of]
008: Stratified samples [construction of], continued
009: Empirical probabilities
010a: Equally likely outcomes
010b: Combinations of equally likely outcomes
011: Tree diagrams to show possibilities
012: Sampling with replacement
013: Sampling without replacement
014a: Conditional probability
014b: Multiplication Rule [of probability]
015: Independent events
016: Stem-and-leaf plots [introduction]
017: Having separate stems for 0-4 and 5-9
018: Ordered stem-and-leaf plots
019: Back-to-back stem-and-leaf plots
020: Pie graphs [pie charts]
021: Mean [introduction]
022: Mode [introduction]
023: Median [introduction]
024: Quartiles [introduction]
025a: Range
025b: Interquartile range
026: Order of operations
027: Consecutive numbers
028: Sum, product, difference, quotient
029: Factors
030a: Prime numbers
030b: Composite numbers
031: Types of data
032: Recurring decimals
033a: Index laws summary (Years 11, 12)
033b: Index laws summary (Years 9, 10)
034a: Scientific notation [standard form]
034b: To convert a number to scientific notation
034c: To convert scientific notation to a normal number
035: Simultaneous equations [introduction]
036: Simultaneous equations: substitution method 1
037: Simultaneous equations: elimination method 1
038: Simultaneous equations: elimination method 2
039: Simultaneous literal equations
040: Partial fractions
041: Gradient of a [straight] line
042: Gradient formula
043: Drawing a straight line from the equation
044: [Getting the] Straight-line equation from the graph
045a: Equation from one point and gradient
045b: Equation from two points
046: Solving simultaneous equations graphically
047a: Finding the angle of a slope
047b: Perpendicular lines
048a: Distance between two points
048b: Formula for distance between two points
049: Midpoint of a line
050: Angle between intersecting lines
051: Three simultaneous equations
052: Negative numbers
052: Integers
053: The number line
054: The number plane
055a: Greater than
055b: Less than
055c: Greater than or equal to
055d: Less than or equal to
056: Plotting ranges of integers
057: Adding integers
058: Multiplying integers
059: Leaving out the multiply sign
060a: Subtracting integers
060b: The negative of a number
061: Dividing integers
062a: Minor and major arcs
062b: Angle subtended by an arc
063: Angles standing on the same arc
064: Angles on same arc at centre and circumference
065: Angles in a semicircle
066: Opposite angles in a cyclic quadrilateral
067a: Radius bisecting a chord
067b: Chords of equal length
068a: Tangents to a circle
068b: Angle between tangent and radius
068c: Lengths of tangents from the same external point
069a: Area of a sector
069b: Area of a segment
070: Breaking a number into its prime factors
071a: A set
071b: Equal sets
071c: Equivalent sets
072a: Null set
072b: The universal set
072c: Subsets
072d: Disjoint sets
073a: Union of two sets
073b: Intersection of two sets
073c: Complement
073d: Finite and infinite sets
073e: Number of elements
074: Venn diagrams to illustrate sets
075a: The set of natural numbers
075b: The set of integers
076a: The set of rational numbers
076b: The set of real numbers
077a: Quadratic surds
077b: Surds of the n-th power
078a: Simplest form of a surd
078b: Rationalising the denominator
079: The discriminant
080: Solving inequations
081: Solving quadratic inequations
082: Simultaneous linear and quadratic equations
083: Turning-point form for any quadratic relation
084: Formulas for sketching any quadratic relation
085: Parabola from intercepts and symmetry
086: The quadratic equation formula
087: Powers
088: Exponential graphs
089: Multiplying powers
090: Dividing powers
091a: Raising a power to a power
091b: Raising a negative number to a power
092: Powers and brackets
093: Raising to the power of zero
094: Negative powers
095: Ratios
096: Simplifying ratios
097: Equivalent ratios
098: Sharing ratios
099: Value for money
100: Scale diagrams
101: Rates
102: Units of speed
103: Average speed
104: Direct variation
105: Inverse variation
106: Fitting data
107: Joint variation
108: Part variation
109: Venn diagrams to illustrate probability
110a: Intersection and union
110b: Compound event law
111a: Mutually exclusive events
111b: Complementary events
112: Odds
113: Winning streaks
114: Polynomials
115: Rational functions
116: Finding quadratic relations from the graph 1
117: Rectangular hyperbolae
118: The truncus
119: The equation of a circle
120: Right-angled triangles
121: Pythagoras’s theorem
122: Finding a shorter side
123: Pythagorean triples
124: Converting odds to probability
124: Even money
125: Partial fractions: more complicated cases
126: improper rational functions
127: Partial fractions: more complicated examples I
128: Partial fractions: more complicated examples II
129: Equating coefficients: some examples
130: Simultaneous parabola and line
131: Simultaneous circle and line
132: Simultaneous hyperbola and line
133: Partial fractions: more complicated examples III
134: Using SIMULT on the CAS
135: Set difference
136: Intervals of real numbers
137: Special subsets of the real numbers
138a: Relations
138b: Domain and range
139a: Relations defined by a rule
139b: Implied domain
140: Graphing relations
141: Mapping diagrams
142: Types of relations
143a: Functions
143b: Vertical line test
144: Function notation
145: Using mapping notation for functions
146: The meaning of percentage
147: Converting percentages to fractions
148: Converting fractions to percentages
149: Converting percentages to decimals
150: Converting decimals to percentages
151: Percentage of
152: Making comparisons using percentages
153a: Points percentage
153b: Wins percentage
154a: Mark-up
154b: Discount
155: Simple interest
156: Percentage growth
157: Gradient-intercept form of a linear equation
158a: Acute angles
158b: Obtuse angles
158c: Reflex angles
158d: Right angles
158e: Straight angles
158f: Revolution
159: Linear programming
160a: Measuring angles with a protractor
160b: Naming angles
161a: Complementary angles
161b: Supplementary angles
162: Bisecting an angle
163: Bisecting a line
164: Vertically opposite angles
165: Parallel lines
166: Corresponding angles
167: Alternate angles
168: Co-interior angles
169: Congruent triangles
170: Sum of angles in a triangle
171: Quadrilaterals
172: Sum of angles in quadrilaterals
173a: Constant function
173b: Linear function
174: Horizontal line test
175: Restrictions of a function
176: Hybrid functions
177: Inverse functions
178: Inverse functions - examples
179: Radians
180: Converting from degrees to radians
181: Converting from radians to degrees
182a: Definitions of sine and cosine
182b: Symmetry properties of sine and cosine
183a: Definitions of tangent
183b: Relation of tangent to sine and cosine
184: Trigonometric ratios [SOH CAH TOA]
185: Quadrants
186: Symmetry properties of trig functions
187a: Signs of trig functions
187b: Negative angles
188: Exact values of trig functions
189: Sine and cosine graphs
190: Dilation of sine and cosine graphs
191: Reflection of sine and cosine graphs
192: Translations of sine and cosine graphs
193: Solving trig equations
194: Solving multiple-angle trig equations
195: General trig graph: an example
196: Symmetry properties of trig functions
197: Addition of ordinates
198: Graph of the tan function
199: Frequency tables
200: Histograms
201: Frequency polygons
202: Box-and-whisker plots
203: Surveys (census)
204: Samples [data]
205: Perimeter
206: Circumference [circles]
207: Arc length
208: Perimeter of a composite figure
209: Units of area
210: Areas of quadrilaterals
211: Areas of triangles
212: Heron’s formula [triangles]
213: Areas of circles
214: Areas of sectors of circles
215: Surface area of solids
216: Volume of prisms
217: Fractional powers
218a: Multiplying surds
218b: Dividing surds
219: Adding and subtracting surds
220: Cubic functions
221: Simple cubic functions
222: Points of inflection
223: Remainder theorem
224: Factor Theorem
225a: Difference of perfect cubes
225b: Sum of perfect cubes
226: Solving cubic equations
227: Graphing cubic functions
228: Solving cubic inequations
229: Finding a cubic equation from the graph
230: Factorising functions numerically
231: Sequences
232: Sequences generated by polynomials
233: Difference sequences
234: Finite differences for polynomials
235: Difference tables for general polynomials
236: Finding the rule from a difference table
237: Reciprocal trigonometric functions
238: Reciprocal trig function identities
239: Pythagorean trigonometric identity
240: Addition formulae
241: Double-angle formulae
242: Examples of trigonometric proofs
243: Simplifying a sin x + b cos x
244: Lattice diagrams
245: Expected number of events
246: Sample space
247: Events
248: Complementary events
249: The Addition Rule for probability
250: Interior and exterior angles
251: Constructing an angle of 60 degrees
252: Constructing an angle of 120 degrees
253: Constructing an angle of 90 degrees
254: Copying an angle
255: Sum of angles in polygons
256: Nets of three-dimensional shapes
257: Areas of composite shapes
258: Surface area of a sphere
259: Volumes of spheres
260: Volumes of pyramids
261: Commission
262: Finding 100%
263: Depreciation
264: Appreciation
265: Rates of change
266: Constant rates
267: Non-constant rates
268: Tangent to a curve
269: Finding the gradient at a point on a curve
270: Rates of change of simple functions
271: Rates of change using graphics calculators
272: Displacement
273: Velocity
274: Acceleration
275: Pronumerals or variables
276: Factors
277: Terms
278: Expressions
279: Equations
280: Simplifying terms
281: Labelling triangles
282: The sine rule
283: The cosine rule
284: Trig rule for area of a triangle
285: Arc length with radian angle
286: Chord length
287: Area of sector with radian angle
288: Area of segment with radian angle
289a: Angle of elevation
289b: Angle of depression
290: Compass bearings
291a: Planes
291b: Common line between two planes
292a: Line of greatest slope
292b: Angle between two planes
293: Adding and subtracting terms
294: Expanding brackets
295: Expanding and simplifying
296: Expanding binomial times binomial
297: Difference of perfect squares
298: Expanding perfect squares
299: Simplifying algebraic fractions
300: Factorising
301: Substituting into rules
302: Debits, credits and balance
303: Compound interest formula
304: Two-two grouping factorisation
305: Factorising easy quadratics: cross method
306: Exponential functions
307: Solving simple exponential equations
308: Definition of logarithm
309: Logarithm laws
310: Solving exponential equations using logarithms
311: Logarithm graph
312: Definition of a vector
313: Vector notation
314: Addition of vectors
315: Multiplication of vector by a scalar
316a: Zero vector
316b: Negative of a vector
317: Subtraction of vectors
318: Polygons of vectors
319: Parallel vectors
320: Position vectors
321: Linear combinations of non-parallel vectors
322: Components of vectors
323: Magnitude of a vector
324a: Unit vectors
324b: Unit vector in the direction of a given vector
325: Vector equations
326: Vectors in three dimensions
327: Translations of parabolas
328a: Dilations of parabolas
328b: Inversion of a parabola
329: Turning-point form of quadratic equation
330: Factorising harder quadratics: cross method
331: Square roots
332: Cube roots
333: Rational and irrational numbers
334: Alternate segment theorem
335: Limit
336: Gradient at a point in the limit
337: Derivative of an expression
338a: Differentiation
338b: Differentiation by first principles
339: The derived function
340a: Derivative of a constant multiple
340b: Derivative of a sum
341: Deltas and dy/dx
342: Operator notation for derivative
343: Estimating the derivative from the graph
344: Differentiability
345: Limit of a function
346a: Limits from the left and right
346b: Limit at infinity
347a: Continuity
347b: Continuity and differentiability
348: Absolute value function
349: Formal definition of limit
350: Limit laws
350: Null factor law
352: Solving quadratic equations using the NFL
353: Solving quadratic equations in turning-point form
354: Finding r on a TI-83 calculator
355: Finding a quadratic equation from a difference table
356a: Solving an equation using inverse operations
356b: Advanced inverse operations
357: Examples of inverse operations
358: Transposing formulae
359: Differentiating positive powers of x
360: Differentiating negative powers of x
361: Differentiating integral powers of x
362: The chain rule
363: Examples of the chain rule
364: Function of function notation
365: Differentiating rational powers of x
366: Obtaining dx/dy from dy/dx
367: The second derivative
368a: Sequences
368b: Rule for a sequence
369: Difference equations
370: Arithmetic sequences
371: Arithmetic mean
372: Arithmetic series
373: Geometric sequence
374: Geometric mean
375: Compound interest as a geometric sequence
376: Geometric series
377: Infinite geometric series
378: Equation solving tricks 2a
379: Diameter and radius
380: Similar figures
381: Similar triangles
382: Naming sides in a right-angled triangle
383: SOH CAH TOA
384: Examples of SOH
385: Examples of CAH
386: Examples of TOA
387: Inverse trigonometric functions
388: Finding angles in right-angled triangles
388: Degrees, minutes and seconds on a CAS
390: Getting the five-figure summary from the ogive
391: Periodic graphs
392: Sine graphs
393: Distance
394: Average speed
395: Using calculus in kinematics
396: Formulae for constant acceleration
397: Examples of constant acceleration formulae
398: Using calculus for velocity-time graphs
399: Discrete random variables
400: Probability distribution function
401: The hypergeometric distribution
402: The binomial distribution
403: Normal to a curve
404: Finding the tangent using the derivative
405: Examples of rates of change from derivative
406: Stationary points
407: Sketching graphs from the stationary points
408: Types of stationary points
409: Minimax problems using derivatives
410: Sketching arbitrary non-polynomials
411: Antidifferentiation
412: Indefinite integrals
413: Antiderivative of polynomials
414a: Antidifferentiation of rational powers
414b: Using a piece of data to fix c
415: Area under a curve
416: Definite integrals
417: Definite integral laws
418: Numerical integration
419: Left endpoint integration
420: Right endpoint integration
421: Fundamental theorem of integral calculus
422: Trapezoidal integration
423: Integrals as the limits of sums
424: Sum notation
425: Addition counting rule
426: Multiplication counting rule
427: Permutations
428: Factorials
429: Permutation notation
430: Combinations
431: Combination notation
432: Pascal’s Triangle
433: Examples of permutations
434: Examples of combinations
435: Constructing graph scales
436: Contour maps
437: Leading digit estimation
438: Naïve profit and loss
439: Rounding
440: Decimal places
441: Significant figures
442: Converting units
443: Types of triangle
444: Similar triangle tests
445: Two-mean regression line
446a: Density
446b: Concentration
447a: Forces
447b: Equilibrium
448: Normal force
449: Triangle of forces
450: Triangle of forces—examples I
451: Triangle of forces—examples II
452: Resolution of forces
453: Equilibrium in terms of force components
454: Resolution of forces—examples
455: Cartesian coordinates
456: Polar coordinates
457: Polar coordinate notation
458: Converting polar to Cartesian coordinates
459: Converting Cartesian to polar coordinates
460: Curve sketching in polar coordinates
461: Rooting negative numbers
462a: Complex numbers
462b: Real part of a complex number
462c: Imaginary part of a complex number
463: Equality of two complex numbers
464: Functions of complex numbers
465: Adding and subtracting complex numbers
466: Multiplying a complex number by a real
467: Powers of i
468: Multiplying complex numbers
469: Multiplying complex numbers—examples
470: Complex conjugate
471: Sum of perfect squares
472: Factorising arbitrary quadratic expressions
473: Dividing complex numbers
474: Dividing complex numbers—examples
475: Argand diagrams
476: Adding on the Argand plane
477: Multiplying on the Argand plane
478: Complex conjugate on the Argand plane
479a: Amplitude of a complex number
479b: Phase of a complex number
480: Example factorisation over C
481: Complex number in polar form
482: Multiplying and dividing in polar form
483: Euler’formula
484: The Binomial Theorem
485: The Binomial Theorem: Examples
486: Sign diagrams
487: The product rule
488: The quotient rule
489a: Integral of a sum of functions
489b: Integral of a constant multiple of a function
490: Integral of powers of linear functions
491a: integral of 1/x
491b: Integral of 1/(ax+b)
492: Area between two curves
493: Converting a recurring decimal to a fraction
494: Differentiation of trig functions
495: Integration of trig functions
496: Equation of an ellipse
497: Conic hyperbolae
498: The exponential function
499: Exponential and log inverses
500: Determining exponential rules
501: Determining logarithmic rules
502: Change-of-direction transformation
503: Change-of-direction transformation (cont.)
504: Derivative of the exponential function
505: Derivative of the logarithm function
506: Integration of exponential functions
507: Integration of 1/(ax+b)
508: Linear approximation
509: Odd and even functions
510a: Matrix notation
510b: Dimensions of a matrix
511: Equal matrices
512: Matrix elements
513a: Adding matrices
513b: Subtracting matrices
514: Multiplying a matrix by a scalar
515: Multiplying matrices
516: Determinant of a 2 x 2 matrix
517: Inverse of a 2 x 2 matrix
518: Simultaneous equations using matrices
519: Translations using matrices
520: Dilations using matrices
521: Rotations using matrices
522: Reflections using matrices
523: Composition of mappings
524: Mean value of a distribution
525: Variance of a distribution
526: Standard deviation of a distribution
527: Mean and variance of a linear function
528: Statistics of the binomial distribution
529: Statistics of the hypergeometric distribution
530: Continuous random variables
531: The normal distribution
532: Standardised normal variable
533: Evaluating normal probabilities
534: Approximating the binomial with the normal
535: Change-of-direction transformation III
536: Cylindrical image transformation
537a: State of a system
537b: State vectors
538: Probabilistic state vectors
539: Markov processes
540: Transition matrices
541: Transition matrices (continued)
542: Transition matrices examples 1
543: Transition matrices examples 2
544: Transition matrices examples 3
545: Distribution of run lengths
546: Distribution of run lengths—Bernoulli example
547: Markov run length example
548: Outliers for univariate data
549: Modern box plots
550: Creating random data on CAS
551: Median of a continuous random variable
552: Quartiles and percentiles of a random variable
553: Mode of a random variable
554: Expected profit for a random event
555: Splitting stems—advanced
556: Class intervals
557: Bar charts
558: Segmented bar charts
559: Shapes of histograms and stem plots
560: Symmetric and skewed distributions
561: Outliers from a histogram
562: Reading skew from a boxplot
563: Statistics symbols
564: Calculating the mean from frequencies
565: Standard deviation
566: The 68–95–99.7% rule
567: Dependent and independent variables
568: Ordered back-to-back stem plots
569: Parallel box plots
570: Two-way frequency tables
571: Percentaged two-way tables
572: Pearson’s r correlation coefficient
573: Correlation and causation
574: The coefficient of determination
575: Numerical and categorical data
576: Scatterplots
577: Positive and negative relationships
578: Strengths of relationships
579: Quadratic stuff
580: Substitution tricks
581: Factorising using substitution tricks
582: Cross method: more easy examples
583: The quadratic factorisation formula
584: Introduction to parabolas
585: Equation solving tricks 1
586: Equation solving tricks 2b
587: Equation solving tricks 3a
588: Equation solving tricks 3b
589: Problem solving using linear equations
590: Sums of algebraic fractions with repeated factors
591: Simplifying products of algebraic fractions
592: Simplifying quotients of algebraic fractions
593: Finding quadratic relations from the graph 2
594: Finding quadratic relations from the graph 3
595: Finding quadratic relations from the graph 4
596: Finding quadratic relations from the graph 5
597: Quadratic regression
598: Fitting a straight line by eye: equal-points
599: Residual errors from a predicted line
600: Fitting a straight line by eye: equal-errors
601: Fitting a straight line: three-median method 1
602: Fitting a straight line: three-median method 2
603: Fitting a straight line: least-squares regression
604: Interpreting a straight-line fit
605: Interpolation and extrapolation
606: Making a table of values from a rule
607: Plotting a graph from a table of values
608: Getting the gradient from the rule
609: Calculating the y-intercept
610: Calculating the x-intercept
611: Travel graphs
612: Reading speed off a travel graph
613: Set notation for inequation solutions
614: The equation of a semicircle
615: Calculating residuals
616: Analysing residuals
617: Non-linear relationships
618: Parabolic transformation
619: Logarithmic transformation
620: Reciprocal transformation
621: Simultaneous equations: substitution method 2
622: Simultaneous equations: substitution method 3
623: Simultaneous equations: elimination method 3
624: Time series
625: Secular trends
626: Seasonal trends
627: Cyclic trends
628: Random trends
629: The two-mean trendline
630: Moving averages
631: 3-point moving averages
632: 5-point moving averages
633: Smoothing seasonal or cyclic data
634: Even-point moving averages
635: 2-point moving averages
636: 4-point moving averages
637: Centred even-point moving averages
638: Centred 2-point moving averages
639: Centred 4-point moving averages
640: Median smoothing
641: 3-point median smoothing
642: 5-point median smoothing
643: Seasonal adjustment
644: De-seasonalising time series 1
645: De-seasonalising time series 2
646: De-seasonalising time series 3
647: Graphing cubic functions with a calculator
648: Sums of polynomials and proper rational functions
649: Converting to an improper rational function
650: Converting to a proper rational function 1
651: Converting to a proper rational function 2
652: Converting to a proper rational function 3
653: Converting to a proper rational function 4
654: Converting to a proper rational function 5
655: Converting to a proper rational function 6
656: Converting to a proper rational function 7
657: Relative frequency
658: Number of outcomes
659: Introduction to tree diagrams
660: Compound events as intersections
661: Ratios as a percentage of the total
662: Ratios in direct proportion
663: Strength of a solution
664: Diluting a solution
665: Drug dosages depending on body mass
666: Ratio of photographic reproduction
667: Gear ratios
668: Mechanical advantage
669: Arithmetic sequences
670: Checking if a sequence is arithmetic
671: Finding d for an arithmetic sequence
672: Finding the first term of an arithmetic sequence
673: Finding the n-th term of an arithmetic sequence
674: Finding the number of an arithmetic term
675: Arithmetic series
676: Arithmetic series from a, L and n
677: Arithmetic series from a, L and d
678: Arithmetic series from a, n and d
679: Finite and infinite sequences
680: Geometric sequences
681: Checking if a sequence is geometric
682: Finding r for a geometric sequence
683: Finding the first term of a geometric sequence
684: Finding the n-th term of a geometric sequence
685: Finding the number of a geometric term
686: Geometric series
687: Geometric series from a, r and n
688: Number of terms needed for a geometric series
689: Growth as a geometric sequence
690: Compound interest as a geometric sequence
691: Infinite geometric series
692: Recurring decimals as infinite geometric series
693: Graphs of arithmetic sequences
694: Graphs of geometric sequences
695: Number of payment periods of compound interest
696: Difference equations
697: First-order difference equations
698: Arithmetic sequence from a difference equation
699: Geometric sequence from a difference equation
700: Combination of arithmetic and geometric sequences
701: Explicit solutions to difference equations
702: Explicit solutions to arithmetic difference equations
703: Explicit solutions to geometric difference equations
704: Explicit solutions to combined difference equations
705: Graphing difference equations
706: Graphing difference equations on a calculator
707: Interpreting difference equation graphs
708: Finding d from Sn, n and a
709: Finding L from Sn, n and a
710: Degree, linears and quadratics
711: Dividing a line segment in a given ratio
712: Parallel lines
713: Finding the first term of an infinite geometric series
714: Finding r for an infinite geometric series
715: Polygons and regular polygons
716: Interior and exterior angles
717: Angle formulas for regular polygons
718: Perpendicular lines
719a: Line segments
719b: Rays
719c: Lines
720: Perpendicularly bisecting a line segment
721: Triangle inside a semicircle
722: Curved surface area of a cylinder
723: Curved surface area of a cone
724: Units of volume
725: Scale factors for lengths, areas and volumes
726: Pythagoras in three dimensions
727: Magic formulas for the sine rule
728: Ambiguous case of the sine rule
729: Magic formulas for the cosine rule
730: Equilateral triangles
731: Right-angled isosceles triangles
732: Degrees, minutes and seconds
733: Working with angles on a TI-83
734: Angles making up a right angle
735: Angles making up a straight angle
736: Standard compass bearings
737: Line segment graphs
738: Step graphs
739: Break-even analysis
740: Graphing a linear inequation
741: Linear programming problems 1
742: Linear programming problems 2