Wedding Cake Ribbon

Customers often want ribbon around fancy cakes, but how does a baker know how much ribbon to buy? Scholars view a cake with multiple layers in different geometric shapes. They must figure the perimeter and circumference and add them together to discover the answer.

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CCSS: Designed
Instructional Ideas

  • Have students design their own three-layer cake with different shapes and figure the length of a ribbon around it
  • Estimate how many people this cake would feed
Classroom Considerations

  • Relies on prior knowledge of both perimeter and circumference
Pros

  • Includes both side and overhead views of the cake
  • Lists the correct answer and reasoning for solving and getting other numbers
Cons

  • None
Common Core