Video: Identifying Rectangles

Is the following figure a rectangle?

01:12

Video Transcript

Is the following figure a rectangle?

We know a rectangle is a 2D shape. The figure we’re given is a 3D shape. The faces of this 3D shape are rectangles. We can’t see all of the faces or sides of our figure, but they are all rectangles. So our 3D figure is made from rectangular faces, but it isn’t a rectangle. The shape shown in the figure is called a cuboid. It’s a 3D shape made from rectangular faces.

So the answer to the question is the figure a rectangle is no. It has rectangular faces, but it isn’t a rectangle. It’s a cuboid. A rectangle is a 2D shape. And our shape is a 3D shape.

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