A tetrahedron, also called triangular pyramid, is a space figure with exactly four triangular faces.
Notice that a tetrahedron has four faces, four vertices and six edges.
If all the triangular faces of a tetrahedron are equilateral triangles, the tetrahedron is called regular tetrahedron.
Jan 09, 19 04:18 PM
What does divisible mean ? A number is divisible by another number if ...
Jan 09, 19 12:41 PM
What is 1 foot ? 1 foot is a unit of length in the customary ...