Octagon is consisting 8 triangles.
This is an Octahedron!
8 pointed star?
An octahedron
No. For example the triangles with sides {3, 4, 5} and {6, 8, 10} are similar but not congruent.
Octagon is consisting 8 triangles.
This is an Octahedron!
8 pointed star?
An octahedron
8
No. For example the triangles with sides {3, 4, 5} and {6, 8, 10} are similar but not congruent.
This shape is called a Icosahedron , I think.
sphere
Tetrahedron or Triangular Pyramid
An octahedron is a closed 3-d shape with 8 polygonal faces. The faces can be triangles, quadrilaterals, pentagons, hexagons or heptagons. So there is no polygon name for an octahedron.
A pyramid.
square