Lesson 1 What Attributes Do You See?

    • Let’s sort shapes into groups.

Warm-up Which One Doesn’t Belong: Who’s in the Group?

Which one doesn’t belong?

  1. 4-sided shape.
  2. 5-sided shape.
  3. 4-sided shape.
  4. 4-sided shape.

Activity 1 Card Sort: Shapes

Your teacher will give you a set of cards that show shapes.

Set of cards with shapes.
  1. Work with your partner to sort the cards into categories. Be prepared to explain your categories.

  2. Take turns sorting the cards into two new categories. Don’t tell your partner how you sorted them. Your partner will then guess how you sorted your shapes.

Practice Problem

Problem 1

Six different shapes labeled A to F.
  1. Which shapes have 5 angles?

  2. Which shapes have all side lengths the same size?