Question

The sides of a triangle are in the ratio of 3 : 4 : 5. If its perimeter is 36 cm, then what is its area?

Answer 1

let the ratio be 3x,4x and 5x

perimeter=3x+4x+5x

36=12x

x=36/12

x=3

3x=9cm. 4x=12cm. 5x=15cm

s=(a+b+c)/2

=(9+12+15)/2

=(36)/2

=18 cm

Area of ∆=√s(s-a)(s-b)(s-c)

=√18(18-9)(18-12)(18-15)

=√18(9)(6)(3)

=√54*54

=54 cm²

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Answer 2

Answer: THIS THE ANSWER FOR YOUR QUESTION MY FRIEND

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Step-by-step explanation:perimeter=3x+4x+5x

36=12x

x=36/12

x=3

3x=9cm. 4x=12cm. 5x=15cm

s=(a+b+c)/2

=(9+12+15)/2

=(36)/2

=18 cm

Area of ∆=√s(s-a)(s-b)(s-c)

=√18(18-9)(18-12)(18-15)

=√18(9)(6)(3)

=√54*54

=54 cm²