RIC-1069 Maths terms and tables
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Three-dimensional shapes<br />
Platonic solids<br />
The Platonic solids [see p. 40] consist of five polyhedra in which all faces are<br />
congruent <strong>and</strong> all angles are congruent. There are only five such regular<br />
solids, <strong>and</strong> these are illustrated below, together with examples of 2-D nets<br />
that fold up to make the 3-D shapes. The 4 faces of the tetrahedron, 8 faces<br />
of the octahedron, <strong>and</strong> 20 faces of the icosahedron are all equilateral<br />
triangles. The 6 faces of the hexahedron (cube) are all regular quadrilaterals<br />
(squares), while the 12 faces of the dodecahedron are regular pentagons.<br />
Tetrahedron Hexahedron (cube) Octahedron<br />
Dodecahedron<br />
Icosahedron<br />
R.I.C. Publications ® www.ricpublications.com.au <strong>Maths</strong> <strong>terms</strong> <strong>and</strong> <strong>tables</strong><br />
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