Question

What is the measure of ABC?

Answer 1

B

Explanation:

the measure of the chord- chord angle ABC is half the sum of the arcs intercepted by the angle and its vertical angle , that is

∠ ABC =
`(1)/(2)` (AC + DE) =
`(1)/(2)` (75 + 45)° =
`(1)/(2)` × 120° = 60°