Question

Answer this question from my question paper 1 mark question no. 5 only

Answer 1

the angle acb =35°
the angle at he centre =2 times the angle on the circle.

Answer 2

Theorem: the angle subtended by an arc at the center is double the angle subtended by it on any point of the remaining part of the circle.

Angle AOB=2 Angle ACB
70°=2×angle ACB
70/2=angle ACB
35° =angle ACB