Question
Find the diagonal $ d_2 $ of a rhombus if area $A = 18\, \text{cm}$ and diagonal $d_1 = 9\, \text{cm}$.
Answer
$4$
Explanation
To find diagonal $ d2 $ use formula:
$$ A = \dfrac{ d_1 \cdot d_2 }{ 2 } $$After substituting $A = 18\, \text{cm}$ and $d_1 = 9\, \text{cm}$ we have:
$$ 18\, \text{cm} = \dfrac{ 9\, \text{cm} \cdot d_2 }{ 2 } $$$$ 18\, \text{cm} \cdot 2 = 9\, \text{cm} \cdot d_2 $$$$ 36\, \text{cm} = 9\, \text{cm} \cdot d_2 $$$$ d_2 = \dfrac{ 36\, \text{cm} }{ 9\, \text{cm} } $$$$ d_2 = 4 $$This page was created using
Rhombus Calculator