# Lesson 3 Attributes that Define Shapes

Let’s play Mystery Quadrilateral.

## Warm-up Number Talk: Multiply Multiples of Ten

Find the value of each expression mentally.

## Activity 1 Learn How to Play Mystery Quadrilateral

Play a round of Mystery Quadrilateral with your teacher.

Partner A: Choose a shape from the group of quadrilaterals. Place it in the mystery quadrilateral folder without your partner seeing it.

Partner B: Ask up to 5 “yes” or “no” questions to identify the quadrilateral. Then guess which quadrilateral is the mystery quadrilateral.

Partner A: Show your partner the mystery quadrilateral.

Switch roles and play again.

## Activity 2 Play Mystery Quadrilateral

Partner A: Choose a shape from the group of quadrilaterals. Place it in the mystery quadrilateral folder without your partner seeing it.

Partner B: Ask up to 5 “yes” or “no” questions to identify the quadrilateral. Then guess which quadrilateral is the mystery quadrilateral.

Partner A: Show your partner the mystery quadrilateral.

Switch roles and play again.

## Practice Problem

## Problem 1

One of these quadrilaterals is Diego’s mystery quadrilateral.

List some questions you would ask to figure out Diego’s mystery quadrilateral. How would the answers help you figure out which quadrilateral it is?