How it works
Area = n·s² ÷ (4·tan(π/n)); interior angle = (n−2)·180° ÷ n.
Regular Polygon Calculator
Area, perimeter and angles of any regular polygon.
Your details
Area
90.8478
Perimeter
35
Interior angle
128.57°
Sum of angles
900°
Diagonals
14
Area, perimeter and angles of any regular polygon.
Area = n·s² ÷ (4·tan(π/n)); interior angle = (n−2)·180° ÷ n.