Perimeter & Area: Which Structure Has Largest/Smallest?

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SUMMARY

The discussion centers on determining which of four geometric structures—a square, rectangle, L-shaped building, and circle—has the largest and smallest perimeter when all have the same area. It is established that among these shapes, the circle has the largest perimeter while the square has the smallest perimeter. The relevant equations include the area of a circle (A = πr²) and the perimeter of a square (P = 4s), where 's' is the side length. The rectangle's perimeter can vary based on its dimensions but is generally larger than that of a square with the same area.

PREREQUISITES
  • Understanding of basic geometric shapes and their properties
  • Knowledge of perimeter and area calculations
  • Familiarity with equations for area and perimeter of circles, squares, and rectangles
  • Ability to analyze geometric relationships and inequalities
NEXT STEPS
  • Research the properties of geometric shapes with fixed area
  • Learn the derivation of the perimeter formulas for circles, squares, and rectangles
  • Explore the concept of geometric optimization in architecture
  • Study the implications of perimeter-to-area ratios in design
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Students preparing for geometry tests, educators teaching geometric properties, architects considering design efficiency, and anyone interested in the mathematical relationships between area and perimeter.

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I had a question on a test & could not get an answer and was wondering if someone might have a clue. The question presented four buildings--a square, rectangle, L-shaped building and circle. All of the buildings are one-story and have the same area. The question was which structure had the largest perimeter & which had the smallest perimeter. None of the multiple choice answers were none of the above or all of the above. Any help would be greatly appreciated.
 
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paul.redgate said:
I had a question on a test & could not get an answer and was wondering if someone might have a clue. The question presented four buildings--a square, rectangle, L-shaped building and circle. All of the buildings are one-story and have the same area. The question was which structure had the largest perimeter & which had the smallest perimeter. None of the multiple choice answers were none of the above or all of the above. Any help would be greatly appreciated.

What are the relevant equations? What is the area of a circle in terms of its diameter? In terms of its perimeter? What is the area of a square in terms of its perimeter (or more to the point, its perimeter in terms of its area)? Same question for a rectangle -- is a rectangle's perimeter bigger or smaller than a square with the same area?
 

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