How to find a side of Nonagon!!! ERGENT?

Question

how to find a side of nonagon given area is about 164.3 HELP PLEASE ERGENT!!!!!!!

Answer 1

nonagon has 9 sides. so 164.3/9 = 18.25

Answer 2

Area = p² ÷ (4n tan [180/n]) where p = perimeter and n = number of sides



164.3 = p² ÷ (36 tan 20)

164.3 (36 tan 20) = p² = 2152.8 (rounded)

p = √2152.8 = 46.4 (rounded)

so each side is that divided by 9, about 5.155

Answer 3

12.17.