2-4 Special Pairs of Angles
Definitions:
Complementary angles
If two angles are complementary angles then the two angles sum are 90 degrees
Supplementary angles
If two angles are supplementary angles then the two angles sum are 180 degrees
Vertical angles
If two angles are vertical angles then the angles are 2 angles such that the sides of one angle are opposite rays to the sides of the other angle
Note: The sides of the angles have to form 2 intersecting lines
Complementary angles
If two angles are complementary angles then the two angles sum are 90 degrees
Supplementary angles
If two angles are supplementary angles then the two angles sum are 180 degrees
Vertical angles
If two angles are vertical angles then the angles are 2 angles such that the sides of one angle are opposite rays to the sides of the other angle
Note: The sides of the angles have to form 2 intersecting lines
A theorem for vertical angles
If two angles are vertical angles then they are congruent (or equal)
In short we can write: Vertical angles are congruent
If two angles are vertical angles then they are congruent (or equal)
In short we can write: Vertical angles are congruent