Question

What is the measure of DEF

Answer 1

72°

Explanation:

∠DEF is an inscribed angle equal to half the arc on which it rests

∠DEF = 0,5 × 144 = 72°

Answer 2

72

Explanation:

The measure of the inscribed angle(DEF) is half the measure of its intercepted arc (Arc FD)

The measure of are FD is 144 and half of that is 72.

So the measure of angle DEF is 72 degrees.