Young mathematicians explore the world of three-sided shapes in this lesson on the different types of triangles. Starting with a general introduction to classification using Venn diagrams, children learn how to categorize triangles based on the lengths of their sides and size of their angles. They complete a series of practice problems to demonstrate their knowledge.

Additional Tags

math

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Instructional Ideas

• Add this lesson into an upper elementary geometry unit on triangles
• Extend the lesson by having students draw, cut out, and label different types of triangles to display on a classroom bulletin board
• Use this resource to create packets for each member of the class and work through the content as a whole group, occasionally pausing to invite students to discuss questions and solve problems with a partner or in small groups

Classroom Considerations

• This resource is only available on an unencrypted HTTP website.It should be fine for general use, but don’t use it to share any personally identifiable information

Pros

• Tables that offer examples of each type of angle and triangle are included
• Worksheet includes a wide variety of practice problems that support children with learning to classify triangles
• Provides a teaching guide that offers additional considerations, tips, and an answer key for the worksheet

Cons

• None

Common Core

4.G.A.2 5.G.B.3 5.G.B.4 MP6 MP7