If radius of the circumcircle of an equilateral triangle is 4 cm; then the measure of radius of its incircle is:

2 cm 3 cm 4 cm 1.5 cm

2 cm

In equilateral triangle the ratio of circumradius to inradius is 2 : 1. Therefore, If Circumradius = 4 cm, then inradius = 2 cm