a cone
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No faces, 1 edge, no corners. A circular disk has 1 face, but that is not the same as a circle.
A circle itself? I'm guessing because a circle can have two faces if you flip it over.
Pizza is shaped of a Circle and it has 2 faces, the front and back faces.
a cylinder
A cylinder has 3 faces, a cone 2. A cylinder has 2 edges, a cone 1. A cylinder consists of 2 circles and 1 rectangle, a cone consists of 1 circle and 1 semicircle.