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.

$4 \times 40$
$8 \times 40$
$7 \times 40$
$9 \times 40$

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.

Card sort with quadrilaterals.

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.

4 quadrilaterals labeled A to D.

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?