The area of an decagon is 20
Calculate side, perimeter
Calculate side:
A = 5/2s2√5 + 2√5
A = 2.5s2(3.0776835371753)
| s2 = | 2 x A |
| 5 x 3.0776835371753 |
| s2 = | 2 x 20 |
| 5 x 3.0776835371753 |
| s2 = | 40 |
| 15.388417685876 |
s2 = 2.5993575698633
s = √2.5993575698633
s = 1.6122523282239
Calculate Perimeter:
P = 10 x side
P = 10 x 1.6122523282239
P = 16.122523282239
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
A = 20
P = 16.122523282239
Sides (Edges) = 10
Faces = 1
Vertices = 10
P = 16.122523282239
Sides (Edges) = 10
Faces = 1
Vertices = 10
What is the Answer?
A = 20
P = 16.122523282239
Sides (Edges) = 10
Faces = 1
Vertices = 10
P = 16.122523282239
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.
This calculator has 1 input.
What 1 formula is used for the Decagon Calculator?
P=10s
What 4 concepts are covered in the Decagon Calculator?
- area
- Number of square units covering the shape
- decagon
- 10 sided polygon or 10-gon
- perimeter
- The distance around a shape or object
- side
- line segment joining two vertices in a polygon also known as an edge
