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At the base of the pyramid is a regular triangle (all sides are equal, the angles between the sides of the base are 60 degrees).

The height of the pyramid is exactly at the center of the triangular base.

If the sides of the pyramid are the same as the base are regular triangles, then such a pyramid can be called a tetrahedron.

The height of the pyramid is exactly at the center of the triangular base.

If the sides of the pyramid are the same as the base are regular triangles, then such a pyramid can be called a tetrahedron.

Length = 145

Width = 125

Height = 45

Length = 88

Width = 76

Height = 85

Length = 100

Width = 85

Height = 145

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