Question

the diagonal of a rhombus are 30cm and 16 cm.Find its perimeter

Answer 1

The diagonals of rhombus bisects each other.
They meet perpendicular to each other
${l}^{2} = {15}^{2} + {8}^{2} \\ 225 + 64 \\ 289 \\ l = \sqrt{289 } \\ l = 17cm$
perimeter of rhombus = 4l
4×17
68cm