Platonic solids are generically termed equilateral convex polyhedra ... For instance, the carbon atoms in a diamond are arranged in a tetrahedral shape. Common salt and fool's gold (iron sulfide ...

Hands resting in front of the stomach, thumbs and fingertips touching to form a diamond shape -- Angela Merkel's "rhombus" hand gesture was her most recognisable trademark. The gesture has its own ...

BERLIN (AFP) - Hands resting in front of the stomach, thumbs and fingertips touching to form a diamond shape - Dr Angela Merkel's "rhombus" hand gesture was her most recognisable trademark.

Equilateral convex polyhedra need ... For instance, the carbon atoms in a diamond are arranged in a tetrahedral shape. Common salt and fool’s gold (iron sulfide) form cubic crystals, and calcium ...