Question

OR

If one angle of a triangle is equal to the sum of the other two angles, prove that the

triangle is right angled triangle.​

Answer 1

Explanation:

Since all the angles in a triangle makes up 180 degree. As we know that in a right angle triangle one angle is always 90, So 90= 45 + 45.

Answer 2

Answer:

Sol: Given - B = A+C ------(1)

In ABC ,By Angle Sum Property of Triangle,

A +B+C = 180°

B + (A+C) = 180°

B + B = 180° [From equation (1)]

2B = 180°

B = 180°/2 = 90°

Now ,here B =90° it means ABC is a right angled triangle