Question

plss do C and D
and use this formula
(2n-4)×90/n​

Answer 1

Part C

15 Sides

Step-by-step explanation:

The interior angle of a regular polygon is 156 deg. Hence each exterior angle is 180–156 = 24 deg. So the polygon has 360/24 = 15 sides

ANSWER

Part D

6 Sides

Step-by-step explanation:

If an interior angle of a regular polygon measures 120°, it has 6 sides (Hexagon). Let us solve it step by step. Explanation: Given that, one interior angle is 120 degrees