How it works
For a regular polygon with 5 sides of length s: area = n·s² ÷ (4·tan(π/n)), perimeter = n·s, and each interior angle = (n − 2)·180° ÷ n.
Pentagon Calculator
Area, perimeter and angles of a regular pentagon.
Your details
Area
43.0119
Perimeter
25
Interior angle
108°
Apothem
3.441
Circumradius
4.2533