Geometry math question no guessing and show work you

we will use formula

where

theta is angle

n is number of sides

we are given

n=15

we can plug it

now, we can solve for theta

so,

option-D.........Answer

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130

5.762159

step-by-step explanation:

it would be 9 because when it is the nine is over five so that would mean it rounds up to 90 or 9