ルアー三角形の面積は何ですか?

#include  #include  using namespace std; float areaReuleaux(float h) { if (h < 0) //if h is negative it is invalid return -1; float area = ((3.1415 - sqrt(3)) * h * h)/2; return area; } int main() { float height = 6; cout << "Area of Reuleaux Triangle: " << areaReuleaux(height); }

Area of Reuleaux Triangle: 25.3701