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The Area of an octagon is 15
Calculate side, perimeter
s = | √2(1+√2) |
√A |
s = | √2(2.4142135623731) |
√15 |
s = | √4.8284271247462 |
√15 |
s = | 2.1973682269356 |
3.8729833462074 |
s = 0.56735803656047
P = 8 x side
P = 8 x 0.56735803656047
P = 4.5388642924837
Interior Angle Sum = (sides - 2) x 180°
Interior Angle Sum = (8 - 2) x 180°
Interior Angle Sum = 6 x 180°
Interior Angle sum = 1080°
Diagonals = | n(n - 3) |
2 |
Diagonals = | 8(8 - 3) |
2 |
Diagonals = | 8(5) |
2 |
Diagonals = | 40 |
2 |
Diagonals = 20
1 vertex Diagonals = n - 3
1 vertex Diagonals = 8 - 3
1 vertex Diagonals = 5
Triangles = N - 2
Triangles = 8 - 2
Triangles = 6
Sides (Edges) = 8
Faces = 1
Vertices = 8