What is the radius of the circle inscribed in triangle ABC if AB = 15, AC = 40, and BC = 50?
+2666 The radius of the circle is \(\text{Area} \over \text{semiperimeter}\).
The semiperimeter is half of the perimeter, and find the area using Heron's formula: \(\text{Area} = \sqrt{s(s-a)(s-b)(s-c)}\), where s is the semiperimeter.
