Shapes and Volume

Lesson 13

Math

Unit 3

5th Grade

Lesson 13 of 16

Objective


Classify trapezoids based on the presence of one or two sets of parallel sides. Define parallelograms as trapezoids with two sets of parallel sides.

Common Core Standards


Core Standards

  • 5.G.B.3 — Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.
  • 5.G.B.4 — Classify two-dimensional figures in a hierarchy based on properties.

Foundational Standards

  • 4.G.A.2

Criteria for Success


  1. Understand that a parallelogram is a trapezoid with two pairs of parallel sides. 
  2. Sort figures into parallelograms and non-parallelograms.
  3. Classify parallelograms into a hierarchy based on properties (MP.7).
  4. Use and understand the notation to denote parallel sides in a figure.

Tips for Teachers


Lesson Materials

  • Quadrilateral Venn diagram — These are from Lesson 12.
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Anchor Tasks

25-30 minutes


Problem 1

These are parallelograms: These are not parallelograms:

Based on this sort, say what a parallelogram is in your own words. Compare your definition with a partner. 

Guiding Questions

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Student Response

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References

Achievement First Grade 5, Unit 8, Unit Plan (2016-2017)Diagram

Grade 5, Unit 8, Unit Plan (2016-2017) is made available by Achievement First as a part of their Open Source web portal under a CC BY 4.0 license. Copyright © 1999-2017 Achievement First. Accessed Feb. 6, 2018, 12:55 p.m..

Modified by Fishtank Learning, Inc.
Illustrative Mathematics What is a Trapezoid? (Part 1)

What is a Trapezoid? (Part 1), accessed on Feb. 5, 2018, 12:08 p.m., is licensed by Illustrative Mathematics under either the CC BY 4.0 or CC BY-NC-SA 4.0. For further information, contact Illustrative Mathematics.

Modified by Fishtank Learning, Inc.

Problem 2

Decide whether the following statements are always, sometimes, or never true. 

a.   A polygon is a parallelogram.

b.   A parallelogram is a polygon.

Guiding Questions

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Student Response

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References

Institute for Mathematics and Education Photo: Progressions for the Common Core State Standards in Mathematics (Geometry, K-6)5.G.4 (p. 18)

Progressions for the Common Core State Standards in Mathematics (Geometry, K-6), by the Common Core Standards Writing Team is made available by Institute for Mathematics and Education, University of Arizona. © 2007 The Arizona Board of Regents. All contents copyrighted. All rights reserved. Accessed May 17, 2018, 4:49 p.m.. For updates and more information about the Progressions, see http://ime.math.arizona.edu/progressions.

Modified by Fishtank Learning, Inc.

Problem Set

15-20 minutes


Discussion of Problem Set

  • Look at #3. Do you agree with Jami’s decision to call the figure in #2 a trapezoid? Why or why not? 
  • Look at #5. Do you agree with Tyrone’s conclusion?

Target Task

5-10 minutes


Identify whether the following statements are true or false.

a.   A parallelogram is always a trapezoid. T / F

b.   A quadrilateral is always a parallelogram. T / F

c.   A parallelogram is always a polygon. T / F

Student Response

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Additional Practice


The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.

Word Problems and Fluency Activities

Word Problems and Fluency Activities

Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.

Next

Classify parallelograms based on the presence or absence of right angles or based on the presence or absence of sides of equal length. Define rectangles as parallelograms with four right angles and rhombuses as parallelograms with four equal sides.

Lesson 14
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Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Volume of Three-Dimensional Figures

Topic B: Classification of Two-Dimensional Shapes

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