Math Help - What is the perimeter of this rhombus

1. What is the perimeter of this rhombus

"In rhombus RHOM, the length of diagonal MH is 18 cm, and the measure of angle RHO = 60 degrees."

2. Originally Posted by ronmascara
"In rhombus RHOM, the length of diagonal MH is 18 cm, and the measure of angle RHO = 60 degrees."
first, make a sketch.

you need to use the following facts ...

1. all sides of a rhombus are equal in length.

2. the diagonals of a rhombus form four congruent right triangles within the rhombus.

3. the ratio of the sides of a 30-60-90 triangle is
$1 : 2 : \sqrt{3}$