An isosceles trapezium.
The shape of a pyramid without its top is called a frustum. A frustum is formed when a pyramid is sliced parallel to its base, resulting in a truncated shape that has two parallel bases: one larger and one smaller. This geometric figure retains the original triangular faces of the pyramid, minus the apex.
A regular tetrahedron (triangular pyramid).
A pentagonal pyramid.
I doubt it because no matter how big the base is, if you laid the triangles in to the position of the base (ex 4 triangles to a square base) they would have a larger area than the base shape
A rectangular frustum.
It is the net of its solid shape. If the top of the pyramid is cut off parallel to the base, then it is a truncated pyramid, or a frustum.
The shape of a pyramid without its top is called a frustum. A frustum is formed when a pyramid is sliced parallel to its base, resulting in a truncated shape that has two parallel bases: one larger and one smaller. This geometric figure retains the original triangular faces of the pyramid, minus the apex.
It is the net of its solid shape. If the top of the pyramid is cut off parallel to the base, then it is a truncated pyramid, or a frustum.
Rectangle
Triangular.A pyramid has triangular faces
Most likely, a frustum of a sphere.Most likely, a frustum of a sphere.Most likely, a frustum of a sphere.Most likely, a frustum of a sphere.
A tri-lateral pyramid, also known as a regular tetrahedron.
A regular tetrahedron (triangular pyramid).
A pentagonal pyramid.
A circle.
A triangular based based pyramid is a TETRAHEDRON. It becomes a regular tetrahedron if the four triangles, that make up its shape, are REGULAR, that is they are all the same size by area and shape; that is they are congruent. The word 'polyhedron' means a solid shape of any number of sides.
I doubt it because no matter how big the base is, if you laid the triangles in to the position of the base (ex 4 triangles to a square base) they would have a larger area than the base shape