Question

find the angle which is equal to its supplement​

Answer 1

Answer:

Let the angle be x, put x+x=180∘, and then find the value of x to solve the question. We have to find the angle which is equal to its supplement. Let the angle be x. Hence, the angle which is equal to its supplement is 90 degrees.

Answer 2

Answer:

Acid turns blue litmus red and bases turns red litmus blue

The answer is 90 degrees because 180's half is 90