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Find the area of a rhombus whose diagonals are $12\ cm$ and $13\ cm$.
Given: The diagonals of rhombus are $12\ cm$ and $13\ cm$ respectively
To do: To find the area of the rhombus.
Solution:
As given, diagonals of rhombus are $d_1=12\ cm$ and $d_2=13\ cm$
Area of rhombus $=\frac{1}{2}\times(d_1\times d_2)$
$=\frac{1}{2}\times12\times13=6\times13=78\ cm^2$
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