Question

if one angle of a traingle is equal to the sum of the other two angles,then the triangle is-

Answer 1

Suppose we are having a ∆ ABC,
In which,
<A+<C=<B eq(1)
Now in ∆,
<B+(<A+<B)= 180°

From eq(1)
<B+<B= 180°
2<B= 180°
<B=180°/2
<B= 90°
So in one angle of ∆ ABC is 90° or if one of the angle of ∆ is 90° it is known as Right angle Triangle.
Hen