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The Area of a nonagon is 15
Calculate side, perimeter
A = 9/4s2cot(180°/9)
s2 = | 4A |
9cot(180°/9) |
s2 = | 4 x 15 |
9cot(20) |
s2 = | 60 |
9 x 2.7474774228644 |
s2 = | 60 |
24.727296805779 |
s2 = 2.42646822543
s = √2.42646822543
s = 1.5577124976805
P = 9 x side
P = 9 x 1.5577124976805
P = 14.019412479124
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