An Icosahedron.
A triangular prisim (3 faces on sides, one face on bottom).
A square and rectangle both have congruent triangles in them.
congruent triangles
Congruent Triangles have the same angles and side length measures
An Icosahedron.
An icosahedron.
This shape is called a Icosahedron , I think.
square based pyramid
A hexagon based pyramid.
A triangular prisim (3 faces on sides, one face on bottom).
You are a triangular based pyramid (tetahedron) with 4 faces, 6 edges and 4 vertices.
If the triangles are congruent then it is a triangular-based prism.
A square and rectangle both have congruent triangles in them.
A Cuba has 6 congruent faces
A four faced figure is a tetrahedron. If they are all congruent triangles, they are all equilateral triangles and it is a regular tetrahedron - one of the 5 Platonic Solids.
congruent triangles