Question

Two angles of a triangle area 50° and 40°. Prove that the triangle is right angled.​

Answer 1

Answer:

angle a+b+c=180

if two angles sum is 90° (here 50+40)

then third is right angle ie 90

therefore it is a right angled triangle

Answer 2

Answer:

The triangle is a right triangle because

Step-by-step explanation:

Sum of all angles of a triangle = 180

let the another angle be x.

50°+ 40° + x = 180

90° + x = 180

x = 90°

So, we all know that a triangle whose one angle is 90 is a right triangle.