Question

angle A+ angle B=140°, anhle B = 80°, angle A = ?, angle C = ?


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Answer 1

Given:

Angle(A+B)= 140°

Angle B= 80°

So,

Angle A=?

C=?

A+B= 140°

A+80°= 140°

A= 140°-80°

A= 60°

As we know,

Sum of all angles of a triangle is 180°

So,

Angle(A+B+C)=180°

60°+80°+C=180°

140°+ C= 180°

C=180°-140°

C= 40°