Find the diagonal $ d_1 $ of a rhombus if area $A = 45$ and diagonal $d_2 = 9$.
Answer
$d_1 = 10$
Explanation
To find diagonal $ d1 $ use formula:
$$ A = \dfrac{ d_1 \cdot d_2 }{ 2 } $$After substituting $ A = 45 $ and $ d_2 = 9 $ we have:
$$ 45 = \dfrac{ d_1 \cdot 9 }{ 2 } $$$$ 45 \cdot 2 = d_1 \cdot 9 $$$$ 90 = 9 \cdot d_1 $$$$ d_1 = \dfrac{ 90}{ 9 } $$$$ d_1 = 10 $$This page was created using
Rhombus Calculator