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5 Flat surfaces 4 flat surfaces (3 for the sides and 1 for the base).
cube pyramid cylinder * * * * * 3-d objects with only flat surfaces (a different question) are polyhedra.
The top and bottom flat surfaces (the 2 circles or ellipses) and the curved surface make up the 3 surfaces.
well, it depends is it a triangle on the bottom, or is it a square? if it is a triangle on the bottom, it has 3, + the bottom is 4, if it is a square bottom then it has 4 siides + the bottom is 5.
There are 3 angles in a triangle.