# A triangle has corners at #(2 , 1 )#, #(1 ,3 )#, and #(3 ,4 )#. What is the radius of the triangle's inscribed circle?

##### 1 Answer

Mar 29, 2018

#### Answer:

#### Explanation:

Let the vertices of

let

Then,

**right-triangle.**

We know from **Geometry,** then,