The GMAT Math practice question is a problem solving question on right triangles in geometry
What is the radius of the incircle of the triangle whose sides measure 5, 12 and 13 units?
- 2 units
- 12 units
- 6.5 units
- 6 units
- 7.5 units
The correct choice is (A) and the correct answer is 2 units
The triangle given is a right angled triangle as its sides are 5, 12 and 13 which is one of the Pythagorean triplets.
In a right angled triangle, the radius of the incircle is given by the following relation
As the given triangle is a right angled triangle, radius of its incircle =
= 2 units.