Geometry 3D Help
Answers Level 2
Octahedron, Tetrahedron...
See graphics and read descriptions of an octahedron, cube, tetrahedron, regular convex dodecahedron and regular convex icosahedron. Have help with the Geometry 3D game level 4.
Octahedron
A regular octahedron is a polygon with eight faces. Each face is an equilateral triangle.
Cube
The cube is the only regular hexahedron
.
Cubes have six faces.
Tetrahedron
Tetrahedra are symmetrical Platonic solids
with four triangular faces.
A tetrahedron has four triangular faces.
Tetrahedra are the simplest form of pyramid with
a triangular base.
Dodecahedron
A regular convex dodecahedron is a polygon with twelve faces. Each face has five edges in the shape of a pentagon.
Icosahedron
A regular convex icosahedron has twenty
triangular faces. It's also known as a
Platonic
icosahedron.
