Question

if the area of a triangle is 180 cm² and its sides are in a ratio of 3:4:5
what is it's perimeter??​

Answer 1

Answer:

soln

area=180cm2

its sides are in ratio of 3:4:5

so,

let the ratio of sides of the triangle be x

now,

3x+4x+5x=180cm2

or,12x=180cm2

or,x=180÷12

or,x=15

now,putting the value of x

3x=3×15=45

4x=4×15=60

5x=5×15=75

now,perimeter of triangle = sum of all the sides so,

45+60+75=160

perimeter of triangle = 160.