If you are a cube, one of the sides is called a face. Same with a cone, the flat part is a face.
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the face
2d shape is a shape that is flat on the surface, but 3d shape is a shape that comes out of the surface. Like it is just in front of you.2d is just flat on the surface which is the difference. Hope you understand. Rebecca Ng 5
Are determined by (a) the shape of the flat surface, (b) the area of the flat surface, and (c) the size of the square units.
half a sphere
a cone