Enter Decagon Info Below
The side of an decagon is 20
Calculate perimeter, area
Calculate Perimeter:
P = 10 x side
P = 10 x 20
P = 200
Calculate Area:
A = 5/2s2√5 + 2√5
A = 2.5(20)2(3.0776835371753)
A = 2.5(400)(3.0776835371753)
A = 3077.6835371753
Calculate Sum of the Interior Angles:
Interior Angle Sum = (sides - 2) x 180°
Interior Angle Sum = (10 - 2) x 180°
Interior Angle Sum = 8 x 180°
Interior Angle sum = 1440°
Calculate decagon diagonals
| Diagonals = | n(n - 3) |
| 2 |
| Diagonals = | 10(10 - 3) |
| 2 |
| Diagonals = | 10(7) |
| 2 |
| Diagonals = | 70 |
| 2 |
Diagonals = 35
Calculate diagonals from 1 vertex:
1 vertex Diagonals = n - 3
1 vertex Diagonals = 10 - 3
1 vertex Diagonals = 7
Calculate number of Δ from 1 vertex:
Triangles = N - 2
Triangles = 10 - 2
Triangles = 8
Other Properties:
Sides (Edges) = 10
Faces = 1
Vertices = 10
s = 20
P = 200
A = 3077.6835371753
Sides (Edges) = 10
Faces = 1
Vertices = 10
What is the Answer?
s = 20
P = 200
A = 3077.6835371753
Sides (Edges) = 10
Faces = 1
Vertices = 10
How does the Decagon Calculator work?
Free Decagon Calculator - Solves for the side, perimeter, and area of a decagon.
This calculator has 1 input.
What 1 formula is used for the Decagon Calculator?
What 4 concepts are covered in the Decagon Calculator?
areaNumber of square units covering the shapedecagon10 sided polygon or 10-gonperimeterThe distance around a shape or objectsideline segment joining two vertices in a polygon also known as an edgeExample calculations for the Decagon Calculator
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