there are 6 equally spaced points a , b , c , d , e and f marked on a circle with radius r . how many convex pentagons of distinctly different areas can be drawn using these points as vertices ?
solution : since , all the points are equally spaced ; hence the area of all the convex pentagons will be same . answer : option d
divide(factorial(6), multiply(factorial(subtract(6, const_2)), factorial(const_2)))