# 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?

## Activity 1 Card Sort: Shapes

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

Work with your partner to sort the cards into categories. Be prepared to explain your categories.

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

Which shapes have 5 angles?

Which shapes have all side lengths the same size?