The side of a nonagon is 6
Calculate perimeter, area
P = 9 x side
P = 9 x 6
P = 54
A = 9/4s2cot(180°/9)
A = 9/4(6)2cot(20)
A = 9/4(36)cot(20)
A = 81 x 2.7474774228644
A = 222.54567125201
Interior Angle Sum = (sides - 2) x 180°
Interior Angle Sum = (9 - 2) x 180°
Interior Angle Sum = 7 x 180°
Interior Angle sum = 1260°
Diagonals = | n(n - 3) |
2 |
Diagonals = | 9(9 - 3) |
2 |
Diagonals = | 9(6) |
2 |
Diagonals = | 54 |
2 |
Diagonals = 27
1 vertex Diagonals = n - 3
1 vertex Diagonals = 9 - 3
1 vertex Diagonals = 6
Triangles = N - 2
Triangles = 9 - 2
Triangles = 7
Sides (Edges) = 9
Faces = 1
Vertices = 9
s = 6
P = 54
A = 222.54567125201
Interior Angle sum = 1260°
Diagonals = 27
1 vertex Diagonals = 6
Triangles = 7
Sides (Edges) = 9
Faces = 1
Vertices = 9
s = 6
P = 54
A = 222.54567125201
Interior Angle sum = 1260°
Diagonals = 27
1 vertex Diagonals = 6
Triangles = 7
Sides (Edges) = 9
Faces = 1
Vertices = 9
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