3-Dimenional Figures

A rhombus is a 2-dimensional figure. But when used as one of, if not all, the faces of a 3-D figure it forms a rhombic solid. They can range in complexity usually by how many faces and what if any other 2-D figures are also used.

The surface area of one of these solids can be found most simply with a net showing the proportions of each face and how many there are. Play around with an applet until you feel comfortable with this information.

A common 30-faced rhombic solid is the tricontahedron. While this figure is on the more complex side, it still has applications, particularly in origami. Look over the process or even attempt creating one by visiting this link.

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References:
a href="https://demonstrations.wolfram.com/GoldenRhombicSolidsWithNets/" target="blank">Solids and Nets
Origami Rhombic Tricontahedron