Advanced Mathematics Primary 2 Shapes and Patterns

Priya says: "All 3D shapes with a curved surface cannot stack flat." Is she correct?

A Yes, because curved surfaces always roll
B No, because a cylinder can stack flat on its circular face.
C Yes, because curved shapes have no flat faces
D No, because a sphere can stack on its curved side
Show Worked Solution

Worked Solution

A cylinder has a curved surface AND two flat circular faces. When placed on a flat face, a cylinder can stand and stack. Priya is wrong because a cylinder (curved surface) CAN stack flat. Answer: No, because a cylinder can stack flat on its circular face.

Correct answer: No, because a cylinder can stack flat on its circular face.

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