| A | B |
|---|
| Diameter | The distance across a circle through its center |
| Point | Undefined term named with a capital printed letter |
| Line | Undefined term named by a lower case script letter |
| Plane | Undefined term named by an upper case script letter |
| Postulate | An axiom |
| Congruent | Same size and shape |
| Equal | Same size |
| Similar | Same shape, proportional size |
| Theorem | A true statement that follows as a result of other true statements |
| Right Angle | =90 degrees |
| Point | The intersection of 2 lines |
| Solve an equation | Find the value of the variable that makes a statement true |
| Slope | Steepness |
| Rise Over Run | Slope |
| Change in Y over Change in X | Slope |
| Rate of Change in a Graph | Slope |
| Change in Y | Rise |
| Change in X | Run |
| Independent Variable | X |
| Dependent Variable | Y |
| Line Segment | All the points between the endpoints |
| Ruler Postulate | Put one endpoint on zero and the other can be on a positive real number |
| Origin | (0,0) |
| Segment Addition Postulate | A is between B & C and BA + AC = BC |
| Pythagorean Theorem | a^2+b^2=c^2 |
| Distance Formula | Used to find length |
| Circumference | The perimeter of a circle |
| Line | The intersection of 2 planes |
| Equilateral | Same length sides |
| Equiangular | Same size angles |
| Area of a Triangle | 1/2bh |
| Area of a Rectangle | bh |
| Area of a Square | side^2 |
| Area of a Circle | Pi*r^2 |
| Circumference of a Circle | d*Pi |
| Diameter | 2r |
| Bisect | Cut into 2 equal parts |
| Midpoint | A point that bisects a segment |
| Acute | >0 degrees and <90 degrees |
| Obtuse | >90 degrees and <180 degrees |
| Reflex | >180 degrees and <360 degrees |
| Circumference | 2Pir |
| Justify | provide reasoning and/or proof |
| Explain | show reasoning |
| Evaluate | Find the value of an algebraic expression for a given value of the variable |
| Prime Number | Has exactly two positive factors, one and itself |
| Prime Factorization | The expression of a number as the product of prime numbers |
| Coefficient | A numerical factor ina term of an algebraic expression |
| Coefficient | the "3" in 3a |
| Triangle | 3-sided polygon |
| Reciprocal | Multiplicative Inverse |
| Opposite | Additive Inverse |
| Area | Measured in squre units |
| Ray | Part of a line with an endpoint and all points in the opposite direction |
| Collinear | On the same line |
| Coplanar | In the same plane |
| Between | If AB + BC = AC, then B is this to A & C |
| Endpoint | The beginning of a ray |
| Geometry | A branch of mathematics that studies the physical world |
