Question
Find the diagonal $ d_2 $ of a rhombus if area $A = 140\, \text{cm}$ and diagonal $d_1 = 20\, \text{cm}$.
Answer
$14$
Explanation
To find diagonal $ d2 $ use formula:
$$ A = \dfrac{ d_1 \cdot d_2 }{ 2 } $$After substituting $A = 140\, \text{cm}$ and $d_1 = 20\, \text{cm}$ we have:
$$ 140\, \text{cm} = \dfrac{ 20\, \text{cm} \cdot d_2 }{ 2 } $$$$ 140\, \text{cm} \cdot 2 = 20\, \text{cm} \cdot d_2 $$$$ 280\, \text{cm} = 20\, \text{cm} \cdot d_2 $$$$ d_2 = \dfrac{ 280\, \text{cm} }{ 20\, \text{cm} } $$$$ d_2 = 14 $$This page was created using
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