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Perimeter check! Pairs work on finding the areas of semicircles and quarter circles using a relationship with squares. The problems challenge pupils to find areas of composite figures made from rectangles, semicircles, and quarter circles.
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CCSS:
Designed
Concepts
Additional Tags
Instructional Ideas
- Lead a discussion about which other areas of sectors of circles would be easy to calculate
- Have groups create figures made from semicircles, quarter circles, circles, and rectangles and find the area of the figure
Classroom Considerations
- The class should know the formulas for area and circumference of circles
- The 19th in a series of 28 lessons
Pros
- Highlights the main concepts within the closing
- Solutions show the steps required to arrive at the final answer
Cons
- None