[" 4.Find the area of a triangle two sides of which are Tecm and tocimeter is "540cm" .Find its are "],[4cm" ."],[" (5.) Sides of a triangle are in the ratio of "12:17:25" and its perimeter is "590cm" .Findits are "],[" colles cologe triangle has perimeter "30cm" and each of the equal sides is "12cm" .Find "]