What is the radius of the in-circle of the triangle whose sides measure 5,12 and 13 units?

What is the radius of the in-circle of the triangle whose sides measure 5,12 and 13 units?

A 2

B 12

C 6.5

D 6

Solution

Correct Answer: Option A

here, radius of in circle = 2(area of triangle)/sum of sides = 60/30=2 units