Question

find x in the following figure​

Answer 1

Answer:

Exterior angle + Interior angle =180°

80 + x = 180°

x= 180°-80°

x = 100°

Answer 2

Hello Mate,

Here is your answer,

Angle AOB = 180 - 80

= 100° (Linear Pair)

Now we know that OA = OB (Radius of circle)

So as per the given figure, AOB is an isoceles triangle.

So angle A = angle B = x°

We Know sum of angles of triangle = 180°

So in triangle AOB,

x + x + 100 = 180°

2x = 80°

x = 40°

Hope it helps:)