| A | B |
|---|
| Congruent | same size, same shape, shapes match exactly |
| Line of Symmetry | a line which every point on one side of figure coincides exactly with a point on the other side of figure |
| point | represented by a "dot" no actual size, named with a letter |
| line | extends forever in 2 directions, straight, determined by 2 points |
| plane | a flat surface that extends forever, has no thickness, determined by 3 noncollinear points |
| collinear | (points) on the same line |
| noncollinear | (pints) not on the same line |
| reflection | a mirror image of a shape |
| polygon | a closed figure formed by 3 or more line segments |
| regular polygon | all sides lengths are equal, all angles are equal (square) |
| quadrilaterals | are 4 sided polygons |
| Parallelogram | has 2 pairs of parallel sides, opposite angles are congruent, opposite sides are congruent |
| Ray | half a line (starts with a point has arrow on other end) |
| opposite rays | 2 rays that share the same endpoint and form a line |
| angle | a figure formed by 2 rays that have the same endpoint |
| Rhombus | a parallelogram with four congruent sides, but no right angles |
| Square | a rhombus with four right angles. All four sides and vertices are congruent |
| Trapezoid | a quadralateral with exactly one pair of parallel sides. |
| rectangle | a parallelogram with four angles |
| perpendicular lines | 2 lines that intersect to form right angles |
| parallel lines | 2 lines that will never touch |
