Question

If the circumradius of an equilateral traingle be 10cm, then the measure of its in-radius is ? ​

Answer 1

eqilater triangle has circumference

centroid and in centre beings the same has the in the radius

so in radius = {(1/3) /(2/3)} = (1/2) of the circum radius

so in radius= (1/2) × 10

= 5cm