If the altitude of an equilateral triangle is 6 units, then the radius of its incircle is ____________.

If the altitude of an equilateral triangle is 2 sqrt(3) , then its area is :

If the radius of the circumcircle of an equilateral triangle is 6 cm , then find the radius of its incircle.

Find the altitude of an equilateral triangle of side 8 cm.

Find the altitude of an equilateral triangle of side 8 cm.

If the sides of a triangle ABC are 6,8,10 units, then the radius of its circumcircle is

If the radius of the circumcircle of an equilateral triangle is 5 cm then find the radius of its in circle.