More correctly it is a 'Tetrahedron'. A Tetrahedron is a solid object with '4' (four) triangular faces.
The Pyramids of Egypt are NOT tetrahedrons, because they have five(5) faces. made up of 4 triangular faces ( which you see) , and a SQUARE BAse (5th face) which they are built on.
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if you can visualize the pyrimads of Egypt do so. these pyrimads are square pyrimads. it means they have a square base. a triangular pyrimad has a triangle base with the three corners of the triangle rising up and meeting at one point.
A triangular pyramid has 4 triangular sides.A rectangular pyramid has 4 triangular sides and 1 rectangular side.
square pyramid
A triangular pyramid.
YesA triangular pyramid is a pyramid having a triangular base. The tetrahedron is a triangular pyramid having congruent equilateral triangles for each of its faces.
Yes because it has many faces which is the meaning of a polyhedron