Question

If one angle of a triangle is equal to the sum of other two, show that the triangle is a right triangle.​

Answer 1

Step-by-step explanation:

angles are a,b,a+b

here

a+b+a+b =180 (sum of angles of triangle is 180)

2(a+b)=180

a+b=90

so,one angle is 90°,it is a right angle triangle.