Question

The area of a rhombus is $90$ $c{m}^2$. If one of the diagonal is $14$ cm, what is the length of the other diagonal?

Answer 1

$A=90=\frac{d_1\times d_2}{2}$

$90\times 2=14\times d_2$

$d_2=\frac{90\times 2}{14}=\frac{90}{7}\approx 13c{m}^2$