A tetrahedron or triangular pyramid
the base of a triangular pyramid is triangle
the base of a triangular pyramid is triangle
If it is a pyramid, then the base shape is a SQURE. If it is a tetrahedron, then the base shape is a triangle.
It can be a pyramid shape with an equilateral triangle base
a pentagonal pyramid is a shape with a base of a triangle, and triangles forming up to the point
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A square based pyramid.
A shape with a square base and four triangular sides is a pyramid.
If the base of the pyramid is a triangle then all its faces would be triangular in shape.
A triangular prism is so called because the shape of the ends is a triangle. A triangular pyramid is so called because the shape of the base is a triangle.
Pyramid with a hexagonal base
A square pyramid has the base of a square,and sides of a triangle. While a triangle pyramid has the base and sides of a triangle.