# What is the perimeter of a triangle, who has a circle inscribed in it with a radius of 4.2?

##### 1 Answer

Mar 1, 2018

See explanation.

#### Explanation:

If you want a numeric answer , I'm sorry you can't have one. There could be simply so many triangles with radius of incircle as

However we have a relation.

**(where r is radius and p is perimeter and # triangle# is area of triangle)**