2D = semi circle
3D = hemisphere
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A cylinder
The object described is a cone. A cone has one vertex (the point where the flat face meets the curved surface) and one flat face (the circular base). Due to its shape, a cone can roll along a flat surface smoothly.
a cone
A cone.
one face, if im correct no corners....im sureCorrect answer:Two faces (one flat and one curved). Usually, in school maths, the flat face is circular but it can be an ellipse if the bottom of the cone is "cut" at a slant.One vertex (also called apex).And, although not asked, one edge.