Question

Pls tell encircled
50 points for correct answer with explanationk

Answer 1

Answer:

4 sides

Step-by-step explanation:

i don't know the steps but I think this is the answer

Answer 2

Answer:

Proof.. Statement

Let ext. Angle is x

X+4x=180/5

X=180/5

X=36

4x=36*4

=144

Ext. angle =360/n

n =360/36

n=10