Classify Types of QuadrilateralsUnit of Study 10: Plane ShapesGlobal Concept Guide: 3 of 4

Content DevelopmentStudents need to understand that a quadrilateral is any closed figure made up of four line segments that connect only at vertices.

Quadrilaterals can be categorized into the following categories: Square, Rectangle, Rhombus, Parallelogram, Trapezoid

Students should explore a variety of shapes, sort them based on attributes, and name them based on their attributes. Quadrilaterals can fall into more than one category. Use the attributes to name the shape.

Vocabulary and attributes should be heavily emphasized throughout this Unit of Study.

It is important to focus on the properties of the figures rather than on simple identification.

Content Development

How can this shape have more than one name?

rectangle

parallelogram

square

rhombus

Quadrilateral with 2 pairs of parallel sides congruent sides and four right angles.

Quadrilateral with all congruent sides.

Quadrilateral with 2 pairs of parallel sides and four right angles.

Quadrilateral with opposite sides parallel.

Day 1 and 2 How can you describe a quadrilateral? How can you compare

quadrilaterals?

Show various examples of quadrilaterals and ask students to notice what all the shapes have in common (all closed figures, all made up of 4 line segments, all have 4 vertices etc.)

Have students sort the quadrilaterals and record the attributes in which they sorted them.

Discuss attributes

Have students build quadrilaterals usingAnglegs and Geoboards

Day 3 How can you classify a quadrilateral?

Can a quadrilateral be classified into more than one category?

Students apply their understanding of quadrilaterals from Day 1 to classifying quadrilaterals on Day 3.

Give students a variety of quadrilaterals (squares, rectangles, rhombi, trapezoids, parallelograms).

Have students discuss the attributes of the shapes and create definitions based on the attributes.

Have students classify shapes based on the student generated definitions.

Misconceptions Alert:Students may think

that a shape can only be classified as one thing. Focus on the

attributes of quadrilaterals and

have students name according to the

attributes.

Enrich/Reteach For students who are struggling with this concept, use

Geoboards and Anglegs to have students build quadrilaterals. Use 9.7 Reteach R83

For students who need extensions, give them a variety of riddles. The Enrich activity on E83 can be used as well as the Enrich Activity Lesson 9.7 403B