The cylinder only has 2 faces which are flat but the sides are curved.
The shape you are describing is a cone. A cone has one flat circular base and one curved surface that tapers to a sharp point at the top. It does not have any sides, which aligns with your description, and it resembles a party hat in appearance.
a solid with flat sides meet at sharp edges and corners is called crystal structure
A hemisphere
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No. A sphere is curved with no corners and it is not flat.A circle could also be considered curved with no corners but flat.
a circle
A cylinder.
Assuming there are no curved sides, it is a decahedron. It is likely to be an octagonal prism but there may be other configurations.
Irregular shape is the term given to an object which has 1 flat side, 1 curved side, no corners but has curved edges.
The cylinder only has 2 faces which are flat but the sides are curved.
curved
The shape you are describing is a cone. A cone has one flat circular base and one curved surface that tapers to a sharp point at the top. It does not have any sides, which aligns with your description, and it resembles a party hat in appearance.
A sphere. A sphere is a solid figure that has no faces, edges, or vertices. This is because it is completely round; it has no flat sides or corners.
a solid with flat sides meet at sharp edges and corners is called crystal structure
A hemisphere
A circle....