Question

in each of the following figures O marks the center of the circle find the size of each unknown lettered angle​

Answer 1

Answer:

In the triangle (40° and x) the third angle is 90°(tangential angle) so x+40°+90°=180°

SO

Angle y and z are equal(as they both Now x+a must be equal to 180°( straight

x=50°

originate from the circumference and both end at the centre) Let the third angle

be a.

line) therefore

a=180°-50°

a=130°

y+z+a=180°

2y=50° y=25°

z=25°

Answer 2

Answer:

This is the answer of this question