Polygon area

Question

formula of polygon area if all side of polygon is equal:

(n * s ^ 2) / 4 * tan(π / n)

where n is number of side of polygon
and s is side's length

can someone correct my code please

import math

sides = int(input("number of side >> "))
sides_l = int(input("side length >> "))
a = math.pi / sides

p_area = sides * sides_l ** 2 / 4 * math.tan(a)

print(f"number of side: {sides} side length: {sides_l} area of polygon: {round(p_area, 3)}")

first input: 6
second input: 5

#expect output
64.952

#my output
21.637

why my answer is not match with expect answer ?

Answer 1

キャサリン ,

use the formula this way:

...
p_area = sides * (sides_l ** 2) / (4 * math.tan(a))
...

Answer 2

Lothar
sorry. i didn't notice that there is a parenthesis cover all last part of formula

thank you! you save my day!