Creating a triangles is as easy as 5, 6, 7. Using a ruler and compass to measure off lengths, a short video shows how to construct a triangle with three specific side lengths. The example creates a triangle with side lengths of 5 cm, 6 cm, and 7 cm. Class members then practice the skills independently.

Concepts

congruent triangles, triangles, shapes drawing, ruler skills, compasses

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Additional Tags

math

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Instructional Ideas

• Lead a discussion on the difference between drawing and constructing
• Have the pupils predict whether all of their triangles will be the same

Classroom Considerations

• Worksheets contain practice for other methods of constructing triangles

Pros

• Explains why the presenter uses the method to determine the lengths
• Provides space on the worksheet to create the triangles

Cons

• None

Common Core

HSG-CO.B.8 MP5 MP6