Question

15. In a triangle ABC, if angle A + angle B = 650

and angle B + angle C = 1400

, then the measure of angle C is

(a) 40°

(b) 25°

c) 115°

(d) 60°​

Answer 1

answer - 115

angle A =40°

angle B= 25 °

hence,

angle C = ∆ A +∆ B +∆ C =180°

= 40+25-180= ∆ C

=115°