Question

Question

Segments AC and BD are diameters of circle Q.
a. Find the measure of arc AB
b. Find the measure of arc AD

Answer 1

Arc AB = 80°

Arc AD= 100°

Explanation:

Arc AB

Since AC is the diameter, it would be 180°, and since arc BC is given (100°), arc AB would be 80°

Arc AD

Since BD is a diameter, it would also be 180°. Arc ED is given and previously you found arc AB. So subtract 50 and 80 from 180 and you'll get 50° for arc AE. Add that with arc ED and you'll get 100°