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This How Many Triangles? lesson plan also includes:
Something for young mathematicians to remember: the sum of any two sides must be greater than the third. Class members investigates the Triangle Inequality Theorem to find the relationship between the sides of a triangle. At the same time, they collect data to develop the relationship between the sizes of the angles of a triangle and the lengths of its sides.
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CCSS:
Adaptable
Concepts
Additional Tags
Instructional Ideas
- Use geometry software to create triangles that can be manipulated to find the range of possible lengths of a third side
Classroom Considerations
- Class members should know the sum of the angles of a triangle is 180
- Requires the use of pipe cleaners or narrow strips of paper that are a foot in length
Pros
- Contains a variety of assessment questions and tasks
- Includes strategies for differentiation
Cons
- None