An icosahedron is a regular polyhedron with 20 equilateral triangle faces.
Equilateral triangle
A tetrahedron
an equiangular triangle meaning all the angles are equal or congruent measures
A hectahedron.
This shape is called a Icosahedron , I think.
An icosahedron is a regular polyhedron with 20 equilateral triangle faces.
Equilateral triangle
The answer is : equilateral triangle
An equilateral triangle.
Equilateral.
There are a few families of polyhedra with identical faces. There are none whose faces have 6 or more sides. There is no special name for polyhedra whose faces are pentagons or pentagrams. A dodecahedron is an example. If coplanar faces are disallowed, the only polyhedron with quadrilateral faces are the cube and rhombohedron. There are infinitely many polyhedra with equilateral triangular faces: the tetrahedron, octahedron and icosahedron are examples.
It is a triangle.
An equilateral triangle.
There are two types of quadrilaterals that are formed when two congruent equilateral triangles are joined. These shapes are rhombus and parallelogram.
Congruent
an equilateral triangle