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Find the area of a triangle whose side...

Find the area of a triangle whose sides are 3cm, 4cm and 5cm respectively.

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`s=(a+b+c)/2`
`=(3+4+5)/2`
`=12/2=6`
Area`=sqrt(s(s-a)(s-b)(s-c))`
`=sqrt(6(6-3)(6-4)(6-5))`
`=sqrt(6xx3xx2xx1)`
`sqrt(36)=6cm^2`
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