In a circle with center O, points A, B, and C are on the circumference. If the angle ∠AOB=80°, what is the measure of the angle ∠ACB?
Show answer & explanation
Correct answer: C
Explanation
Given:
∠AOB = 80°
Formula:
Angle at the circumference = (Angle at the center) / 2
∠ACB = 80° / 2 = 40°