## PROBLEM LINK:

**Author:** Ranjan Kumar Singh

**Tester:** Ved Prakash

**Editorialist:** Sudipto Roy

## DIFFICULTY:

Simple

# PRE-REQUISITES:

Basic Maths

## PROBLEM:

To find the radius of the circumcircle from the given sides of the triangle.

## EXPLANATION:

If a,b and c are the three sides of a triangle then, from the given sides of the triangle, radius of the circumcircle is found by a × b × c/{sqrt((a+b+c)×(b+c-a)×(c+a-b)×(a+b-c))}.

Pseudo Code:

```
r=(a*b*c)/sqrt((a+b+c)*(b+c-a)*(c+a-b)*(a+b-c))
```

Complexity: **O(1)**.