Question

In one angle of a triangle is equal to the sum of the other two angles, then the triangle is?

Answer 1

Let the angles be A,B,C then

A= B+C

Since $A+B+C={180}^{\circ }$ [Angle sum property]

$\Rightarrow A+A={180}^{\circ }$

$\Rightarrow 2A={180}^{\circ }$ $A={90}^{\circ }$

It is a right angled triangle.