Question

If two angle in a traingle add upto 108 then what is the value of the third angle?

Answer 1

Let the First angle be ∠A

       Second angle be ∠B

           Third angle be ∠C

We know that the sum of angles in a triangle is 180.

∴ ∠A + ∠B + ∠C = 180

According to the question, two angles are add upto 108°.

So, ∠A + ∠B = 108°

⇒ 108° + ∠C = 180°

⇒ ∠C = 180° - 108°

⇒ ∠C = 72°

Therefore the value of third angle is 72°