A cylinder is a three-dimensional shape with two matching, parallel circular faces joined by one curved surface; its position or size does not change its identity. The learner distinguishes cylinders from spheres, cones, and prisms by these defining features, including when a circular face appears oval in a drawing. Formal measurement of volume, surface area, nets, and curved-surface properties is not included.
A cylinder is a solid shape with:
The circles may look like ovals in a picture because the cylinder is tilted. They are still circles.
Example: Look at a picture of a soup can.
A sphere has no flat circular faces. A cone has only one circular face and comes to a point. A prism has flat faces instead of one curved surface.
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