| A | B |
|---|
| Vertical angles | two angles whose sides are opposite rays |
| Complementary angles | two angles whose measures have sum of 90 |
| Linear Pair | two adjacent angles whose nonadjacent sides form a straight line |
| Exterior Angle | an angle that is adjacent to an interior angle on a triangle |
| Perpendicular Lines | two lines that intersect to form right angles |
| Hypotenuse | in a right angle, the side opposite to the right angle is the longest side |
| Scalene triangle | a triangle that has no sides congruent |
| Adjacent angles | two coplanar angles that have a common side, and vertex but no common interior points |
| Isosceles triangle | a triangle that has at least two congruent sides. |
| Perimeter | the sum of the lengths of the sides of a polygon |
| Obtuse angle | an angle whose measure is greater than 90 and less then 180 |
| Coplanar points | points and lines in the same plane |
| Collinear points | two points that lie on the same line |
| Parallel lines | coplanar lines that do not intersect |
| Supplementary angles | two angles whose sum is 180 |
