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Grade 5 Math · Level 4, Solids, Volume & Data

Nets of 3D Solids

How the lesson starts: Nets of 3D Solids

1. Kai's Hamster Hotel

   Meet Kai! Kai builds cardboard rooms for a hamster hotel. Each room starts as one flat piece of cardboard. Kai folds it up and, pop, it becomes a 3D box! That flat pattern is called a net.

2. A cube's net

   Here's the net for a cube room. Count the squares: a row of 4, plus one on top and one below. That's 6 squares! Fold them up and they close into a cube, one square for each face.

3. Nets for other rooms

   Kai's tent room uses 2 triangles and 3 rectangles. It folds into a triangular prism. The rooftop room uses 1 square and 4 triangles. The triangles fold up and meet at a point: a square pyramid.