Question

Calculate the value of the exterior angle

Answer 1

In this question, we have to use the exterior angle theorem, which states that

Exterior angle is the sum of non adjacent interior angles.

So we will get

`3x+20+4x+5 =8x+15`

Combining like terms

`7x+25= 8x+15`

`25-15 = 8x-7x \\ x = 10`

And when x =10, exterior angle is

`8(10)+15 = 95 degree`