Constructing SSS Triangles

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.

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CCSS: Adaptable
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