A triangle has corners at #(2 , 1 )#, #(3 ,3 )#, and #(1 ,2 )#. What is the radius of the triangle's inscribed circle?
The radius of a triangle's inscribed circle is called inradius.
Inradius formula :
1) calculate d the distance between the corners of the triangles, use the distance formula :
Since triangle ABD is right-angled,
Area of triangle
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