438 - The Circumference of the Circle

Difficulty : trivial

Solution Description :

2D geometry Problem

First, compute a,b,c where a,b,c are the length of Triangle side
Find S where S is (a+b+c)/2 (1/2 of triangle’s circumference)
Find L =sqrt(s*(s-a)*(s-b)*(s-c))
Compute r:=(a*b*c)/(4*L) (R= half diameter of the circle)
Output (2*Pi*r) (the circumference of circle)

Use Pi = acos(-1.0)