Question

the area of rhombus is 120cm² and one of the diagonalds is 8cm. find the other diagonal. ​

Answer 1

$Area \ of \: rhombus \: = \: \frac{d _{1}d _{2} }{2} \\ given \: \: Area \: = \: 120cm {}^{2} \\ diagonal \: d _{1} = 8cm \\ \\ = )d _{2} = \frac{2A}{d _{1} } \\ = ) \: d _{2} \: = \: \frac{2 \times 180}{8} \\ = ) \: \: \: \: d _{2} \: = \: 45cm$