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
<K OR <JKL OR <LKJ
<J OR <MJK OR <KJM
<M OR <LMJ OR <JML
<L OR <MLK OR <KLM
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).
Practice questions out of the textbook:
pg. 4181-4, 8-11
OL Pg. 4221-3 (estimate the measure) , 8-14, 20-23, 27-35
PAP Pg. 42211-33
PAP Pg. 42713-17, 22-24