Question

the sides of a triangle are in the ratio 3:4:5 and its perimeter is 84 cm find the length of its side.​

Answer 1

Answer:

Let the sides of the triangle be 3x, 4x and 5x.

Perimeter = 84 cm.

As perimeter of a triangle is the sum of all sides.

3x+4x+5x= 84cm.

12x= 84cm.

x=7cm.

1st side = 3x = 3*7 = 21cm.

2nd side = 4x = 4*7 = 28cm.

3dd side = 5x = 5*7 = 35cm.

Hope it helps..!!❣

Answer 2

Answer:

sides= 3x, 4x, 5x

perimeter= sum of sides

84cm = 3x+4x+5x

84cm = 12x

84/12 =. x

7cm = x

length = 7×5= 35cm

breadth = 7×4= 28cm

height= 7×3= 21cm