Question

9. The angle which is equal to its supplementary is......................

Answer 1

Answer:

90°

Step-by-step explanation:

An angle which is equal to it's supplementary angle means that it is equal to 180°/2=90°

Hope this helps you!

Answer 2

Answer:

90 degree

Step-by-step explanation:

We know, if the sum of two angles is equal to 180 degree then they are called supplementary angle.

here both are angles are equal.

Then 2× one angle= 180

one angle= 90.