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Lesson Plan
Illustrative Mathematics

What is a Trapezoid? (Part 1)

For Teachers 3rd - 5th Standards
Challenge your class to construct a definition for trapezoids. Looking at four examples and four non-examples, students individually create definitions and use them to classify an unknown shape. Allow for small group and whole-class...
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Lesson Plan
Illustrative Mathematics

Lines of Symmetry for Quadrilaterals

For Teachers 3rd - 5th Standards
Explore how lines of symmetry help define different categories of quadrilaterals. Looking at a square, rectangle, trapezoid, and parallelogram, young mathematicians discover that each shape has its own, unique symmetry. Encourage your...
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PPT
Curated OER

Quadrilaterals: 2 dimensional shapes with 4 straight sides

For Teachers 1st - 3rd
Which shapes are considered quadrilaterals? View and learn that two dimensional shapes with four straight sides are considered quadrilateral. The rhombus, parallelogram, rectangle, and trapezium are only few of the fabulous shapes...
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Unit Plan
Math.com

Math.com: Quadrilaterals

For Students 4th - 9th Standards
The lesson investigates types of quadrilaterals. Definitions, examples, and a worksheet are available.
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Activity
Other

Gvsu: Quadrilateral Hunt

For Students 9th - 10th
The learning activity asks students to identify quadrilaterals by characteristics rather than appearance. Learners drag the vertices of the shape to reveal the true shape of the quadrilateral. [Requires Java.]
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Activity
Cut the Knot

Cut the Knot: Geoboard

For Students 4th - 6th
Students can use the interactive geoboard to create different types of quadrilaterals and investigate the properties of quadrilaterals. Requires Java. The geoboard can also be downloaded for offline use.
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Interactive
Mangahigh

Mangahigh: Pyramid Panic: Basic Shapes to Advanced Geometry

For Students 9th - 10th Standards
Guide a mummy safely through the burial chambers of a pyramid as you solve length and area problems in basic to advanced geometry. There are four game zones that deal with circles and triangles, quadrilaterals, the Pythagorean Theorem,...
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Unit Plan
BBC

Bbc: Ks3 Bitesize: Properties of Quadrilaterals

For Students 5th - 8th Standards
The tutorial examines the different properties of quadrilaterals. The table consists of picture of the shape and a list of the shape's properties.
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Handout
Khan Academy

Khan Academy: Identifying Quadrilaterals

For Students 3rd Standards
Learn about the properties of rectangles, rhombuses, and squares, and practice identifying them. Includes hints for questions. CCSS.Math.Content.3.G.A.1 Understand that shapes in different categories
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Unit Plan
Khan Academy

Khan Academy: Identify Quadrilaterals

For Students 2nd - 4th Standards
Identify squares, rectangles, and rhombuses. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.G.A.1 Understand that shapes in different categories
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Handout
Khan Academy

Khan Academy: Quadrilaterals Review

For Students 4th
After reviewing the properties of different quadrilaterals, students answer questions about each type.
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Handout
CK-12 Foundation

Ck 12: Geometry: Trapezoids and Kites Study Guide

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This study guide looks at properties and theorems about trapezoids and kites.
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Handout
CK-12 Foundation

Ck 12: Geometry: Parallelograms Study Guide

For Students 7th - 9th Standards
This study guide on parallelograms covers types of quadrilaterals, properties of parallelograms and theorems that describe them, how to identify parallelograms, and special types of parallelograms. It is available for download with free...
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Unit Plan
Shmoop University

Shmoop: Basic Geometry: Quadrilaterals

For Students 7th - 9th Standards
The geometry resource explores quadrilaterals. Descriptions, examples, and practice exercises are included.