A triangle, square or pentagon.
A triangle, square or pentagon.
A cone
All solid figures must have a face. The face need not be planar, but there must be at least one which forms the boundary between the solid and the rest of the universe.This is somewhat an issue of semantics. A sphere has no edges so some would not say the term face applies to it at all. It does have a surface and you can certainly define that as its face. The point being, it depends on how you define "faces" and it may depend on your context as well.
A triangle has only 1 face.
Cube and pyramid
A cylinder and a cone. If you look up 'space figure' in images you should get the idea.
A triangle (and all 2-dimensional or plane figures) have only one face.
The face of a triangle is the flat surface of the solid figure. _________________________________________________ A face is a side of a 3 dimensional figure. So, the number of faces a triangle would be 0.
A triangle, square or pentagon.
A triangle, square or pentagon.
The 7-faced solid is called a "hexagonal pyramid."
A circle * * * * * On the right lines but a circle is not a solid figure. How about a sphere?
A tetrahedron is a solid figure with four flat surfaces that are triangles. Each face of a tetrahedron is a triangle, making a total of four triangular faces in the shape.
pyramid
A cone
All solid figures must have a face. The face need not be planar, but there must be at least one which forms the boundary between the solid and the rest of the universe.This is somewhat an issue of semantics. A sphere has no edges so some would not say the term face applies to it at all. It does have a surface and you can certainly define that as its face. The point being, it depends on how you define "faces" and it may depend on your context as well.