Question

if the and exterior angle at vertex C of angle abc is 110 degree and Angle A equal to50°, then Angle B equals to

Answer 1

exterior angle is the sum of opposite 2 interior angles .so angleA and angle B = exterior angle of C .so angle B = 110-50= 60

Answer 2

Answer:

Angle B equals to 60°

Step-by-step explanation:

Angle sum property of triangle

The sum of angle of any triangle is equal to 180°

It is given that,

1). exterior angle at vertex C of angle abc is 110 degree

Therefore interior angle of angle C = 180 - 110 = 70

2). Angle A equal to50°

To find m<B

By angle sum property,

<A + <B + <C = 180

<B = 180 - (<A +<C) = 180 - (50 + 70) = 60°

Therefore Angle B equals to 60°