Question

if one angle of a triangle is equal to the sum of other two show that the triangle is a right Triangle in angle A equal to Angle B + angle C = 2 angle A and + angle A = 2 angle A + Angle B and angle + angle C = to 180°​

Answer 1

Answer:

In △ABC,

∠A=∠B+∠C

Now, sum of angles = 180

∠A+∠B+∠C=180

∠A+∠A=180

∠A=90

∘

Thus, △ABC, is a right angled triangle.