Video: Determining Whether a Shape Is 2D or 3D

This cube is solid. Find another solid shape.

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Video Transcript

This cube is solid. Find another solid shape.

Objects that occupy space are called solids. They are 3D shapes. A cube is in three dimensions. It’s not flat. Of our three other choices, which of them are 3D? The pink shape is a circle, and it’s flat. The red shape is a square. It is also flat and not solid. The yellow shape is a cylinder. And it is solid and occupies space. It is a 3D shape. So our second solid figure on the screen is the cylinder.

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