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Find the area of a triangle ABC whose si...

Find the area of a triangle `ABC` whose sides are `9m` ,`12 m` and `15 m` respectively.

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Area of `/_\ = sqrt(s(s-a)(s-b)(s-c)`
`s=(a+b+c)/2`
`= (9+12+15)/2=18`
`/_=sqrt(18xx9xx6xx3)`
`/_=27xx2=54m^2`.
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