Adjacent Angles Two angles that share a vertex and common ray. Next Door Angles. Adjacent angles are two angles in a plane that share a common vertex...
Linear Pair Two angles that form a straight line. A linear pair is a pair of adjacent angles formed when two lines intersect. These angles are called...
Complementary Angles Two angles whose sum is 90 degrees. Complementary angles are two angles whose sum is 90 degrees. In other words, if you have two angles,...
Supplementary Angles Two angles whose sum is 180 degrees. Supplementary angles are a pair of angles that add up to 180 degrees. Therefore, if angle A and...
Vertical Angles Opposite angles formed by intersecting lines. Their measures are congruent. Vertical angles are formed by two intersecting lines or intersecting lines and a transversal. These...
Alternate Exterior Angles Congruent Angles, outside of the lines, on opposite sides of the transversal. Alternate exterior angles are pairs of angles that lie on opposite sides...