Assertion: icosahedron's dodecahedron | /r/MadeOf | 4 equilateral triangles
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Source sentences:
text: In geometry, a tetrahedrally diminished dodecahedron (also tetrahedrally stellated icosahedron or propello tetrahedron) is a topologically self-dual polyhedron made of 16 vertices, 30 edges, and 16 faces (4 equilateral triangles and 12 identical quadrilaterals).