Question

10. An angle equal to its supplementary angle is​

Answer 1

Answer:

Two Angles are Supplementary when they add up to 180 degrees. Notice that together they make a straight angle. But the angles don't have to be together.

Answer 2

Let x be two equal angles of its supplement.

Therefore, x+x=180  

o

   [Supplementary angles]  

⇒2x=180  

0

 

⇒x=  

2

180  

o

 

​  

=90  

o

 

Thus, 90  

o

 is equal to its supplement.