| A | B |
|---|
| acute anglee | An angle with a measure greater than 1 degrees and less than 90 degrees |
| adjacent angles | Angles that are next to each other |
| congruent | Having exactly the same shape and size |
| diameter | A line setment that passes through the center of a circle and has endpoints on the circle |
| quilateral triangle | A triangle with all three sides the same length |
| obtuse angle | An angle with a measure great than 90 degrees and less than 180 degrees |
| radius | A line segment from the center of a circle to any point on the circle |
| right angle | An angle with a measure of 90 degrees |
| tessellation | An arrangement of shapes that covers a surface completely without overlaps or gaps |
| vertical angles | When two lines intersect, the angles that do not share a common side. |
