Building with 3-D Shapes · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Building with 3-D Shapes

Mathematics · Geometry · ages 6-7
Name ______________________   Date ____________

  1. Which shapes stack easily into a steady tower?

    • Cubes, because their flat faces sit still on top of each other
    • Cones, because their pointy top balances well
    • Cylinders lying on their side, because they roll into place

  2. A cone on top of a cylinder makes ...?

    • a ball
    • a flat mat
    • a ring
    • a tower like a castle turret

  3. A tower of 5 cubes gets 3 more cubes. How many cubes now?

    Answer: ______________

  4. Which two shapes stack together to make a rocket shape: a cone on top of what?

    • A cylinder
    • A cube
    • A rectangular prism

  5. Prisms stack well because they have flat faces. Is that right?

    Circle one:   True   False

  6. Which combo makes a new solid?

    • two cubes stuck together
    • one cube alone
    • a drawing of a cube
    • a photo of a ball

  7. A model uses 2 prisms and 4 cubes. How many solids in all?

    Answer: ______________

  8. A cube balanced on top of a cone's pointy tip will stand steady.

    Circle one:   True   False

  9. Sam built a shape from a rectangular prism, a cube, and a cone, but he says it only has two kinds of shapes in it. What did Sam get wrong?

    • He should have called the whole thing a cylinder
    • He forgot to count the cube as one of the component shapes
    • He counted the cone as two shapes

  10. A cone on top of a cylinder is still one model made of two parts. Is that right?

    Circle one:   True   False

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Answer key

For grown-ups. Fold this page away before handing over the rest.

Building with 3-D Shapes W1-mt_QNxFnxikCN-s1

  1. Cubes, because their flat faces sit still on top of each other · Flat faces line up and hold each other in place. Points and round sides slide or roll.
  2. a tower like a castle turret · Round tower plus pointy top.
  3. 8 · 5 + 3 = 8.
  4. A cylinder · A cone set on top of a cylinder makes a shape like a rocket's nose and body.
  5. True · Yes: flat on flat is steady.
  6. two cubes stuck together · Joining parts builds a new solid.
  7. 6 · 2 + 4 = 6.
  8. False · The cone's tip is too small and pointy to hold the cube's flat bottom, so it tips over.
  9. He forgot to count the cube as one of the component shapes · Sam used three shapes: a prism, a cube, and a cone. He left one out when he counted.
  10. True · Yes: two parts, one model.
Worksheet · LightMySky