Sorting 2-D and 3-D shapes · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Sorting shapes into groups

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

  1. How many sides does a rectangle have?

    • 3
    • 5
    • 6
    • 4

  2. A cube has flat faces, so it belongs in the flat-faces group.

    Circle one:   True   False

  3. Lena says a square has 4 sides. Is Lena right?

    Circle one:   True   False

  4. How many sides does a pentagon have?

    Answer: ______________

  5. Which pair belongs in the same group when you sort shapes by number of sides?

    • Square and rectangle
    • Triangle and rectangle
    • Circle and triangle

  6. Mia sorts a triangle, a square, and a pentagon by number of sides. Which one has the most sides?

    • Triangle
    • Square
    • Pentagon

  7. A pyramid has 4 triangle faces on its sides and 1 square face on the bottom. How many faces does it have in total?

    Answer: ______________

  8. Tom says a cube has 6 flat faces. Is Tom right?

    Circle one:   True   False

  9. Tom sorts a ball, a cube, and a can into a group called shapes with flat faces. Which shape does not belong?

    • Cube
    • Ball
    • Can

  10. Which sentence best explains a good sorting rule?

    • I put them together because I like them
    • I put them together because they are different sizes
    • I put them together because they all have 4 straight sides
LightMySky · lightmysky.comW1-mt_fEuoBYw6bU-s1

Answer key

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

Sorting shapes into groups W1-mt_fEuoBYw6bU-s1

  1. 4 · A rectangle has 4 straight sides.
  2. True · Every face on a cube is flat, so it fits the flat-faces group.
  3. True · A square has 4 equal sides.
  4. 5 · A pentagon has 5 sides.
  5. Square and rectangle · A square and a rectangle both have 4 straight sides, so they match.
  6. Pentagon · A triangle has 3 sides, a square has 4, and a pentagon has 5. The pentagon has the most.
  7. 5 · Add the triangle faces and the square face: 4 plus 1 makes 5.
  8. True · A cube has 6 square faces.
  9. Ball · A ball is curved all over. It has no flat faces at all, so it does not belong.
  10. I put them together because they all have 4 straight sides · A good sorting rule names something every shape in the group shares, like the number of sides.
Worksheet · LightMySky