Question

Can anyone explain #4 on how to do it

Answer 1

`((n-2)\cdot180)/(n)=144\\ 180n-360=144n\\ 36n=360\\ n=10`

It's decagon.

Answer 2

here is the formula for find the one inside of the polygon:
(n-2).180/n (n shows how many sides does polygon have)
so now we can solve the equation==== (n-2).180/n=144
1144n=(n-2).180
144n=180n-360
360=36n
n=10
so we call it decagon :)