Answer:
Step-by-step explanation:
D
Given:
Sum of interior angle
To find:
Number of sides of a polygon
Solution:
Using sum of interior angles formula:

where "S" is the sum of interior angels and "n" is the number of sides of a polygon.
Divide by 180° on both sides.

Cancel common factor 180°.

Add 2 on both sides.


Switch the sides.

Therefore number of sides of a polygon is
.
What grade is this? are these meant to be fractions?
Your answer is going to be 26 and 14, because 26+14=40, and 26-14=12.:)
Answer:square, triangle, rectangle
Step-by-step explanation: