किसी Δ ABC में यदि ∠A - ∠B = 45° तथा ∠B - ∠C 30° हो ∠A + ∠B= ? - - Kisi Δ ABC Me Yadi ∠A - ∠B = 45° Tatha ∠B - ∠C 30° Ho ∠A + ∠B= ? Maths in hindi, triangles 155° question answers in hindi pdf 145° questions in hindi, Know About 150° Maths online test Maths notes in hindi quiz book 135°