The Heron's Formula is used to compute the area of the triangle when the three sides are known. The formula is:
`A = sqrt(s(s-a)(s-b)(s-c))`
where s is the semi-perimeter of the triangle, and a, b and c are the length of the sides.
The semi-perimeter of the given triangle is:
`s=(a+b+c)/2=(3/5+5/8+3/8)/2=(8/5)/2=4/5`
Plugging the values of s, a, b and c to the formula of area of triangle yields:
`A=sqrt(s(s-a)(s-b)(s-c))=sqrt(4/5(4/5-3/5)(4/5-5/8)(4/5-3/8))`
`A=sqrt(4/5*1/5*7/40*17/40) =sqrt(119/10000)`
`A=sqrt119/100`
Thus, the area of the triangle is `sqrt119/100` square units.
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