| A | B |
| acute angle | An angle with a measure greater than zero but less than 90 degrees. |
| bisect | To separate something into 2 equal parts. |
| complementary | When the sum of 2 angles equals 90. |
| congruent angles | 2 angles that have the same measurement |
| equilateral triangle | A trianle with 3 congruent sides |
| line of symmetry | A line that divides a figure into 2 halves that are reflectionsof each other. |
| obtuse angle | Any angle that measures grate than 90 degrees but less than 180 degrees. |
| ray | A part of a line that extends from one point in one direction. |
| reflection | A type of transformation where a figure is flipped over a line. |
| right angle | An angle that measures 90 degrees. |
| translation | A tyope of transformation wher a figureis slid horizontally, vertically, or both. |
| vertex | A point where 2 sides of a polygon intersect. |
| Transformation | Movements of geometric figures to new points in a coordinate system. |