Question

If one of a triangle is equal to the sum of other two angles, then the triangle is?​

Answer 1

In △ABC,

∠A=∠B+∠C

Now, sum of angles = 180⁰

∠A+∠B+∠C = 180⁰

∠A+∠A = 180⁰

∠A = 90⁰

Thus, △ABC is a right angled triangle.

Answer 2

Answer:

$\huge\mathtt\purple{Hello\:Mate}$

•Let triangle be $\triangle$ ABC

●According to the question⬇

$\angle$ A = $\angle$ B + $\angle$ C

●Sum of all angles of a triangle = 180°

So, $\angle$ A + $\angle$ B + $\angle$ C = 180°

●As we know that angle $\angle$ A = $\angle$ B +$\angle$ C. So 2$\angle$A = 180°

$\angle$ A = 180/2

$\angle$ A= 90°

$\therefore$ this triangle is a right angled triangle.