an octahedron
equilateral triangles
Equilateral triangles
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
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.
A shape that has 8 triangles is called an octahedron. An octahedron is a type of polyhedron that has eight triangular faces, twelve edges, and six vertices. It is one of the five Platonic solids and can be visualized as two pyramids with their bases joined together.
An octagonal cupola is a type of polyhedron. Faces: 18 Edges: 40 Vertices: 24 The octagonal cupola is composed of one octagon, one hexadecagon, eight rectangles, and eight triangles.