Prove that the area of a rhombus is equal to half the area of the rectangle contained by its diagonals.
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okay check this one,
ar(rhoumbus) = 1/2 x d1 x d2 ~ i
we say that, d1=l d2=b
ar(rectangle) = l x b ~ ii
from i ii
ar(rhoubus) = 1/2 x l x b
i.e, ar(rhoumbus) = 1/2 ar(rectangle)
ar(rhoumbus) = 1/2 x d1 x d2 ~ i
we say that, d1=l d2=b
ar(rectangle) = l x b ~ ii
from i ii
ar(rhoubus) = 1/2 x l x b
i.e, ar(rhoumbus) = 1/2 ar(rectangle)
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