A triangle has corners at #(1 , 5 )#, #(4 ,8 )#, and #(9 ,7 )#. What is the radius of the triangle's inscribed circle?
1 Answer
Jun 8, 2017
The radius of the inscribed circle is
Explanation:
Let the radius of the inscribed circle be
The area of the triangle is
Let,
so,
The area of the triangle is
Therefore,