Help learners understand that perimeter and circumference are one in the same. Learners apply their skills to determine the perimeter/circumference of triangles, rectangles, and circles. They then use the same strategy to find the perimeter of a trapezoid. 

Concepts

perimeter of polygons, perimeter of rectangles, perimeter of triangles, circumference

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Additional Tags

math

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Instructional Ideas

• Use the sixth, seventh, and eighth practice problems to challenge pupils that are ready
• Supplement with coordinate geometry to incorporate distance formula or Pythagorean Theorem

Classroom Considerations

• Some learners may not be familiar with pi; place more emphasis on pi if this is the case
• Continues from the previous lesson in an 16-part series

Pros

• Develops formulas from familiar patterns, aiding in pupils' understanding of the concept
• Scaffolds problems to advance to more difficult questions

Cons

• Does not include application questions or context within examples

Common Core

HSG-GPE.B.7