1. Sort the cards into categories of your choosing. Be prepared to describe your categories.
   Pause for a whole-class discussion.
2. Sort the cards into new categories in a different way. Be prepared to describe your new categories.

Your teacher will give your group 3 nets. Each student should select 1 of the 3 nets.

1. Cut out your net and assemble a pyramid. The printed side of the net should face outward.
2. Assemble your group’s 3 pyramids into a triangular prism. Each pair of triangles with a matching pattern will come together to form one of the rectangular faces of the prism. You will need to disassemble the prism in a later activity, so use only a small amount of tape (or no tape at all if possible).
3. Make a conjecture about the relationship between the volume of the pyramid marked P1 and the volume of the prism.
4. What information would you need in order to verify that your conjecture is true?

Don’t throw away your pyramids! You’ll use them again.