Answer:
Step-by-step explanation:
no of sides (n)=11
sum=(n-2)180
=(11-2)180
=9*180
=1620
therefore sum of the interior angles of a polygon having 11 sides id 1620°.
An angle added with it's supplement is 180.
Knowing this: 180 - 13 = 167
It's supplement is 167
Answer:
X < 31
Step-by-step explanation: