A triangle has sides with lengths of 8, 4, and 7. What is the radius of the triangles inscribed circle?
1 Answer
Feb 28, 2016
r =
About 1.47.
Explanation:
Let s be half the perimeter of the triancle with sides a, b, c. Then the radius of the inscribed circle is given by:
r=
See here:
http://www.efunda.com/math/areas/circleinscribetrianglegen.cfm