# Stadium Calculator

When you are apt to build a small stadium for your kids or you are a construction company's owner and signed the contract to build a stadium for 2-3 thousand people, you may need the help of our Stadium Calculator.

As it was mentioned above, a stadium includes two-dimensional geometrical shapes, which are a rectangle and semicircle, which is also known as a disco rectangle. In order to use the calculator correctly, you need to read the following rules and explanations.

### This calculator includes the following algorithms:

*
Height = 2 × r
*

*
Overall length = 2 × r + a
*

*
Area of a stadium (A) = π × r
^{
2
}
+ 2 × r × a
*

*
Perimeter of a stadium (p) = 2 × (πr + a)
*

*
Where:
r
is a radius,
a
is a straight side,
π
= 3.141592654 to 9 decimal places.
*