Video: Understanding Nets of 3D Shapes

This pyramid has 4 orange faces that are triangles and 1 blue face that is a square. You can fold a net of a shape to make that shape. This rectangular prism has 6 faces that are rectangles. Find a net for the rectangular prism.

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Video Transcript

This pyramid has four orange faces that are triangles and one blue face that is a square. You can fold a net of a shape to make that shape. This rectangular prism has six faces that are rectangles. Find a net for the rectangular prism.

We have this example pyramid that shows us how you have a net and a pyramid. We need to take that information and apply it to this rectangular prism. We know that all rectangular prisms have six faces. One thing I see is that in answer choice a, this net does not have six faces, it has four pink faces and one green face for a total of five faces.

This cannot be our net because it does not have the correct number of faces. Answer choice b and c both have six faces, but which one will form this rectangular prism? To decide between b and c, we need to look at the length of the pink rectangle.

In answer choice b, the length of the pink rectangle is shorter than the length of the green rectangle. This cannot be right. If you look at the original rectangular prism, you’ll see the length of the pink side is longer than the length of the green side.

In answer choice c, we have that. The pink side is longer than the green side. This makes answer choice c the correct net for this rectangular prism.

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