Video: Identifying 3D Shapes That Stack, Slide, or Roll

Kerrie Lynskey

Some shapes can roll. Pick another shape that can roll.

01:10

Video Transcript

Some shapes can roll. Pick another shape that can roll.

This shape is a cylinder. A cylinder has curved edges and a curved face. This is why a cylinder can roll. Shapes with curved faces can roll. Does this shape have curved faces or edges? No, all of its faces are flat. And its edges are straight. This shape is a cube. Can a cube roll? No, because all of its faces are flat.

This shape is a sphere. It looks like a ball. A sphere has one continuous curved face. And if you kick a ball, it should roll. This is the shape that can roll, the sphere.

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