A pyramid has one polygonal base and the rest of the faces are triangles. A prism has two congruent polygonal bases and the other faces are rectangles.
No. I has 3 triangle faces and one square face.
There are 12 lateral faces (triangles) and one base so altogether there are 13 faces.
A solid with 8 faces is an octahedron.As all faces are the same it is a regular octahedron.As such it is one of the five platonic solids - the only five 3D objects that can be regular: the tetrahedron (4 equilateral triangles for the faces), the hexahedron (usually called a cube with 6 square faces), the octahedron (as asked, 8 equilateral triangles for the faces), dodecahedron (12 regular pentagons as faces), icosahedron (20 equilateral triangles as faces).
That sounds like a square-based pyramid.
A pyramid has one polygonal base and the rest of the faces are triangles. A prism has two congruent polygonal bases and the other faces are rectangles.
A true triangle is a two dimensional object, so it has NO faces at all (or maybe one). Triangles have 3 sides, but not 3 faces.
Pyramid.
No. I has 3 triangle faces and one square face.
A pyramid.
One octagon and 8 triangles.
There are 12 lateral faces (triangles) and one base so altogether there are 13 faces.
Just one: the base. The other 4 faces are triangles.
a pyramid
a base
A solid with 8 faces is an octahedron.As all faces are the same it is a regular octahedron.As such it is one of the five platonic solids - the only five 3D objects that can be regular: the tetrahedron (4 equilateral triangles for the faces), the hexahedron (usually called a cube with 6 square faces), the octahedron (as asked, 8 equilateral triangles for the faces), dodecahedron (12 regular pentagons as faces), icosahedron (20 equilateral triangles as faces).
triangle and square 4 triangles one square