| A | B |
| Right | a triangle with a 90 degree angle |
| Circle | all the points in a plane that are the same distance from one point |
| Ray | a line that has one endpoint and extends endlessly in one direcion |
| polyhedron | space figures whose faces are polygons |
| corresponding | congruent angles formed by parallal lines |
| line segment | a straight line with 2 end points |
| polygon | a closed figure made up of line segments |
| congruent | another word for equal |
| equilateral | a triangle with all equal sides |
| intersecting | lines that meet at one point |
| plane | a flat surface |
| symmetry | the exact form or arrangement on either side of a dividing line or plane |
| angle | a figure made up of two rays with a common endpoint |
| Paralellel | two lines that will never meet |
| Point | a position in space with no length, width or thickness |
| Line | a straight line that continues forever in either direction |
| Pentagon | a figure with five sides |
| Complementary | two angles that together equal 90 degrees |
| Bisect | to divide into two equal parts |
| Scalene | a triangle with no equal sides |
| Octagon | a figure with 8 equal sides |
| Supplementary | two angles that together equal 180 degrees |
| Hexagon | a figure with 6 sides |
| Perpendicular | lines that intersect and form right angles |
| Isosceles | a triangle with 2 equal sides |