Question

the perimeter of a triangle is 36 cm & its side are in ratio a: b:c = 3:4:5 then a,b,c are respectively
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Answer 1

Answer:

Let the sides of the triangle are 3x,4x,5x

Now , perimeter of triangle =3x+4x+5x=12x

36=12x

x=3

Sides of triangle are :

3×3=9cm

4×3=12cm

5×3=15cm

Step-by-step explanation:

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Answer 2

Answer:

a = 9cm

a = 9cmb = 12cm

a = 9cmb = 12cmc = 15cm

Step-by-step explanation:

perimeter = sum of sides of triangle

a:b:c = 3:4:5

let common factor be x

therefore

a:b:c = 3x:4x:5x

36 = a+b+c = (3x + 4x + 5x)

=> 12x = 36

=> x = 36/12

=> x = 3

a = 3x = 3(3) = 9cm

b = 4x = 4(3) = 12cm

c = 5x = 5(3) = 15cm