Question

how to find length of a triangle when radius of incircle given

Answer 1

What is the radius of the incircle of a triangle with sides of 18,24,30 cm?12 AnswersBoopathy BoovaneshvaranAnswered May 8, 2015radius of the incircle of triangle= area/semi perimeter 


p is half the perimeter, or 
 P=(18+24+30)/2 = 36
 A=square root of (36(36-18)(36-24)(36-30))
    =square root of (36*18*12*6)
    =216 s.cm

radius of the incircle of triangle= 216/36=6cm