Question

1. In figure 3.56, in a circle with centre O, length of chord AB is equal to the radius of the circle. Find measure of each of the following. (1) ZAOB (2) Z ACB (3) arc AB (4) arc ACB. D​

Answer 1

Answer:

Given that, OA = OB = AB

Therefore, triangle OAB is equilateral triangle

Therefor,angle AOB =60°

Now, angle ACB = angle AOB/2

=. 60/2 = 30°

Now, arc AB= (60/360) × 2×22/7 × r

And arc ACB =. 2*22/7*r - arc AB