Answer:
x=
5
/8y+9/2
Step-by-step explanation:
The area of any regular polygon can be expressed as:
(ns^2)/(4tan(180/n)) where n is number of sides and s is a side length (no apothem needed :D)
37.2=5s^2/(4tan36)
s^2=(148.8tan36)/5
s≈4.65m
A negative plus a negative is going to be a negative in this case. so your subtracted but to really look like your adding them together