Polygons Calculator

Enter one of the following combos: (s and n),(r and n),(a and n),(a and s and n)
Side LengthNumber of SidesRadiusApothemPerimeter

Calculate Sum of the Interior Angles:
Interior Angle Sum = (n - 2) x 180°
Interior Angle Sum = (7 - 2) x 180°
Interior Angle Sum = (5) x 180°
Interior Angle sum = 900°

Calculate the number of diagonals of the polygon:
Diagonals =n(n - 3)
2

Diagonals =7(7 - 3)
2

Diagonals =7(4)
2

Diagonals =28
2

Diagonals = 14

Calculate the number of diagonals from one vertex:
1 vertex Diagonals = n - 3
1 vertex Diagonals = 7 - 3
1 vertex Diagonals = 4

Calculate the number of triangles that can be drawn from one vertex:
Triangles = N - 2
Triangles = 7 - 2
Triangles = 5

Construct the formal name of this polygon:
Since the polygon has 7 sides, it is a heptagon