an octahedron
equilateral triangles
Equilateral triangles
The shape with four triangular faces that are all equilateral is a tetrahedron. A tetrahedron is a type of polyhedron that has four vertices, six edges, and four triangular faces. Each face is an equilateral triangle, making it one of the simplest three-dimensional shapes.
equilateral triangles-Apex ;)
A triangular pyramid has four faces, and is referred to as a tetrahedron if the faces ale all equilateral triangles.
Equilateral triangle
An equilateral triangle prism is a three-dimensional geometric shape with two parallel bases that are equilateral triangles, and three rectangular lateral faces connecting the corresponding sides of the triangles. The height of the prism is the perpendicular distance between the two triangular bases. This shape exhibits uniform cross-sections along its height, making it a type of polyhedron with specific properties related to symmetry and volume. Equilateral triangle prisms are often used in various fields, including architecture and engineering, for their structural stability and aesthetic appeal.
Equilateral triangles.
A polyhedron is a solid shape with four or more polygonal faces. A hexahedron is a solid shape with six polygonal faces and so is a particular type of polyhedron.
The faces of a tetrahedron are all triangular polygons. Specifically, a regular tetrahedron has equilateral triangles as its faces, while an irregular tetrahedron can have any type of triangle as its faces, but they will always be triangular in shape. Each tetrahedron has four triangular faces, four vertices, and six edges.
One with 20 polygonal faces.
Equilateral triangles have rotational symmetry.