Question

In the figure,OAB is an equilateral triangle. If O is the centre of the circle , find the measurement of angle ACB

Answer 1

As we know that, angle subtended by an arc at the centre is double the angle subtended by it at any point on remaining part of the circle.

We know that, angle of equilateral triangle = 60 degree
.
. . Angle AOB = 60 degree

Angle AOB = 2 Angle ACB
= angle ACB = 60/2=30

Answer 2

Step-by-step explanation:

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