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Unit 7 - Lesson 5 - Grade 5: Illustrative Mathematics

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Grade 5 Unit 7
Lesson 5: Trapezoids
CC BY 2021 Illustrative Mathematics
Grade 5 Unit 7
Lesson 5: Trapezoids
CC BY 2021 Illustrative Mathematics
Lesson: Trapezoids

What Do You Know About Trapezoids? (Warm Up)

1.

What do you know about trapezoids?

What’s a Trapezoid?

2.

Draw a trapezoid. Label the coordinates of the grid points you used.

3.

Is it a square? Rectangle? Rhombus? Parallelogram? Explain your reasoning.

4.

Describe a trapezoid in your own words. Compare your definition with a partner.

5.

Is this shape a trapezoid according to your definition? Explain your reasoning.

Two Definitions of a Trapezoid

6.

Which statements go with the first definition? Which statements go with the second definition? Explain or show your reasoning.

1. All parallelograms are trapezoids.
2. No parallelograms are trapezoids.
3. All trapezoids are parallelograms.
4. Some trapezoids are parallelograms.
5. No trapezoids are parallelograms.

Cool Down: Which Ones are Trapezoids?
7.

When is a quadrilateral also a trapezoid?

8.

Which of the following shapes are trapezoids? Show or explain your reasoning.