1.

If `A`is the area and `2s`is the sum of the sides of a triangle, then`Alt=(s^2)/4`(b) `Alt=(s^2)/(3sqrt(3))``2RsinAsinBsinC`(d) `non eoft h e s e`

Answer» `25=a+b+c`
`A^2=s(s-a)(s-b)(s-c)`
`AM>=GM`
`(s+(s-a)+(s-b)+(s-c))/4=(s(s-a)(s-b)(s-c))^(1/4)`
`(4s-2s)/4=(A^2)^(1/4)`
`s/2>=(A)^(1/2)`
`AM>=GM`
`((s-a)+(s-b)+(s-c))/3>=((s-a)(s-b)(s-c))^(1/3)`
`s/3>=((A^2/S)^(1/3)`
`S^3/27>=A^2/S`
`A^2/S<=S^3/27`
`A^2<=s^4/27`
`A<=S^2/(3sqrt3)`
Option B is correct.


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