Find the angles which are equal to its supplement?????????

Dear Student

Let the measure of the required angle be x⁰.
We know that, sum of measures of supplementary angle pair is 180⁰.
Then,
= x + x = 180⁰ = 2x = 180⁰
= x = 180/2
= x = 90⁰
Hence, the required angle measures is 90⁰.

Thanks