Question

1. The sides of a triangle
are in the ratio 3:4:5
If it, perimeter is 36cm, then what is its area
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Answer 1

Step-by-step explanation:

3x+ 4x+5x= 36

12x= 36

x= 3

sides will be 3(3), 4(3),5(3) = 9,12,15

u can solve the above question now by herons formula

Answer 2

Answer:

sides=9cm,12cm,15cm and area=162 mark me as brainlist and also follow me

Step-by-step explanation:

let the ratio be x

therefore sides of triangle are

3x,4x,5x

Now,

p(triangle)=sum of all sides

36=3x+4x+5x

36=12x

36/12=x

x=3

therefore sides of triangle are

3x=3×3=9=a

4x=4×3=12=b

5x=5×3=15=c

now

S= perimeter/2=36/2=18

by heron's formula

√S(S-a)(S-b)(S-c)

=√18(18-9)(18-12)(18-15)

=√18×9×6×3

=√2×9×9×2×3×3

=9×9×2

=162