Question

if chord AB = radius of circle, find angle ACB.​

Answer 1

Answer:

OA =OB=AB (given)

Therefore OAB is an equilateral triangle

Angle AOB = 60degree.

We know, angle subtended at a point on a circle is half the angle subtended at the centre.

AngleACB=Angle ADB ÷ 2 = 60 ÷ 2 = 30 degree

Therefore angle ACB = 30 degree