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4. If length of a diagonal of a rhombus is 30 cm and its area is 240sq cits perimeter |
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Answer» Let other diagonal of rhombus = d2Area of rhombus = (d1*d2) /2240 = 30*d2/2240/15 = d2d2 = 16 Let side of rhombus is sThen, Using pythagoras theorams*s = (d1/2)*(d1/2) + (d2/2)*(d2/2)s*s = 15*15 + 8*8s*s = 225 + 64s*s = 289s = 17 Side of rhombus s = 17 cmPerimeter of rhombus = 4*s = 4*17= 68 cm
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