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Math Help - What is the perimeter of this rhombus

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    Question 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."
    thank you in advance.
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    Quote Originally Posted by ronmascara View Post
    "In rhombus RHOM, the length of diagonal MH is 18 cm, and the measure of angle RHO = 60 degrees."
    thank you in advance.
    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}
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