Scholars explore triangles with rods of different lengths. Using rods of 2, 4, 6, 8, and 10 cm class members build as many different types of triangles as they can. They also describe properties of these triangles and determine combinations of rod lengths that cannot produce a triangle.

Concepts

triangles, length, acute triangles, obtuse triangles, right triangles, scalene triangles, isosceles triangles, equilateral triangles

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Additional Tags

math

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Instructional Ideas

• Provide manipulatives (such as sticks of spaghetti) for struggling learners

Classroom Considerations

• Individuals should have access to compasses, rulers, and protractors
• Pupils need to know the differences between types of triangles

Pros

• Teacher guide contains probing questions to use during the activity
• Includes a rubric showing progression of key concepts and where provided sample student work falls under this progression

Cons

• None