The document explains the angle addition postulate, stating that two angles can be added to form a larger angle or a smaller angle can be subtracted from a larger angle to find a measure. It describes complementary angles as two adjacent angles that sum to a right angle and supplementary angles as angles that sum to 180 degrees, which need not be adjacent. Additionally, linear pairs are defined as adjacent and supplementary angles that form a straight line.

1. How Angles Add Up!Angle Addition Postulate

2. Angle Addition PostulateAdd two angles together to create a larger angle. Or subtract a smaller angle from a larger angle to find an angle measure.

3. Complementary AnglesYou can identify complementary angles by the two adjacent angles that cover a right angle. The right angle mark is in red to make it easier to identify.

4. Supplementary AnglesSupplementary angles are two angles that sum to 180o. These angles do not have to be adjacent angles.

5. Linear Pairs Linear pairs are angles that are adjacent and supplementary. They get the name “linear” because these angles create a line.