A N G L E S. What is an angle?. Two rays that share the same endpoint form an angle . The point where the rays intersect is called the vertex of the angle. Vertex. Ray. Angle. Here are some examples of angles. Angle Measurements.
The vertex always goes in the middle
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Two Angles are Complementary if they add up to 90 degrees (a Right Angle).
Two Angles are Supplementary if they add up to 180 degrees (straight angle).
pg. 4181-4, 8-11
OL Pg. 4221-3 (estimate the measure) , 8-14, 20-23, 27-35
PAP Pg. 422 11-33
PAP Pg. 42713-17, 22-24