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