Driver Code
int main ( ) { float side = 4 ; cout << " Area ▁ of ▁ Equilateral ▁ Triangle : ▁ " << area_equi_triangle ( side ) << endl ; cout << " Perimeter ▁ of ▁ Equilateral ▁ Triangle : ▁ " << peri_equi_triangle ( side ) ; return 0 ; }