Question:
Cylinder and hemisphere are examples of
Cylinder and hemisphere are examples of
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If a solid is formed by spinning a 2D shape around an axis — it's a solid of revolution.
Updated On: Jul 15, 2025
- Solids of revolution
- Tetrahedron
- Solids of sectioning
- Polyhedron
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The Correct Option is A
Solution and Explanation
Solids of revolution are three-dimensional shapes formed by revolving a two-dimensional shape around an axis.
A cylinder is formed when a rectangle is revolved around one of its sides.
A hemisphere is formed when a semicircle is revolved around its diameter.
Both these shapes possess circular cross-sections, making them classic examples of solids of revolution.
Tetrahedrons and polyhedrons are formed using flat polygonal faces and do not involve rotational generation.
Solids of sectioning refer to techniques of cutting solid objects for analysis, not specific shapes.
Thus, option (A) is the correct classification.
A cylinder is formed when a rectangle is revolved around one of its sides.
A hemisphere is formed when a semicircle is revolved around its diameter.
Both these shapes possess circular cross-sections, making them classic examples of solids of revolution.
Tetrahedrons and polyhedrons are formed using flat polygonal faces and do not involve rotational generation.
Solids of sectioning refer to techniques of cutting solid objects for analysis, not specific shapes.
Thus, option (A) is the correct classification.
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