Question

1. Find angle OBC. O is centre.
A
30
Ơ
B
С​

Answer 1

Answer:

If A = 30°

Then the angle in the circle

OBC =?

BOC = 1/2*A = 15°

OBC = OCB,

OBC + OCB + BOC = 180

OBC = (180-15)/2 = 82.5°