Biggest Reuleaux Triangle within A Square?

Here we will see the area of biggest Reuleaux triangle inscribed within a square. The side of the square is ‘a’. And the height of the Reuleaux triangle is h.

The height of the Reuleaux triangle is same as a. So a = h. So the area of Reuleaux triangle is −

Example

#include 
#include 
using namespace std;
float areaReuleaux(float a) { //side of square is a
   if (a 

Output
Area of Reuleaux Triangle: 45.1024