I believe what you are thinking of is an octahedron. It resembles two pyramids with square base that are joined.
A hexahedron in the form of a triangular bipyramid: two triangular pyramids stuck together.
A regular octahedron - two square based pyramids stuck together along their square bases.
A ditetrahedron (two triangular pyramids stuck together base-to-base) or, more boringly, a cube.
what is a shape with six congruent sides? Congruent = similar or fit together well My Answer: CUBE ..._ ./_/| |_|/ * * * * * Or a triangular dipyramid which is two regular tetrahedra (equilateral triangular pyramids) stuck together face-to-face.
A shape that has a X, Y and Z axis. It has multiple faces and vertices so it looks like lots of two-dimensional shapes stuck together.
Eight sided three-dimensional shape. Often this looks like two pyramids stuck together at their bases.
Octahedron https://en.wikipedia.org/wiki/Octahedron
diamondActually, i think that it is an octahedron, which looks like 2 pyramids stuck together by their bases.
A hexahedron in the form of a triangular bipyramid: two triangular pyramids stuck together.
A di-pentagonal pyramid: which is two pentagonal pyramids with their pentagonal faces stuck together.
A regular octahedron - two square based pyramids stuck together along their square bases.
A triangular dipyramid - two triangular pyramids stuck together.
A hexahedron or a triangular dipyramid. This is the shape formed by two triangular pyramids (tetrahedrons) stuck together along one triangular face.
a dimond!actually, i think that it is an octahedron, which looks like 2 pyramids stuck together by their bases.
A ditetrahedron (two triangular pyramids stuck together base-to-base) or, more boringly, a cube.
what is a shape with six congruent sides? Congruent = similar or fit together well My Answer: CUBE ..._ ./_/| |_|/ * * * * * Or a triangular dipyramid which is two regular tetrahedra (equilateral triangular pyramids) stuck together face-to-face.
A shape that has a X, Y and Z axis. It has multiple faces and vertices so it looks like lots of two-dimensional shapes stuck together.