Question

In circle E, the measure of the indicated angle AEC is 243.5°. Lines AD and DC are tangent lines.

Answer 1

Explanation:

M < AEC = 360 - 243.5 = 116.5 degrees.

m < AED and ECD = 90 degrees

m < ABC = 1/2 * 116.5 = 58.25 degrees.

m < ADC = 360 - 2*90 - 116.5 = 63.5 degrees.