Answers

2016-03-12T12:54:24+05:30
A regular tetrahedron is one in which all four faces are equilateral triangles. It is one of the five regular Platonic solids, which have been known since antiquity. In a regular tetrahedron, not only are all its faces the same size and shape (congruent) but so are all its vertices and edges.
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2016-03-12T13:02:23+05:30
It is also known as 'triangular pyramid'.

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