Math Problem Statement
Solution
To find the perimeter of the figure:
Description of the Shape:
This figure consists of a rectangle flanked by two semicircles. The rectangle's length is 4 inches, and the height (which is also the diameter of the semicircles) is 4 inches.
Step-by-Step Calculation:
-
Perimeter of the Two Semicircles:
- Together, the two semicircles form a full circle.
- The diameter of the circle = 4 inches, so the radius is:
- Circumference of the full circle = . Substituting and :
- So, the combined perimeter of the semicircles = 12.56 inches.
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Perimeter of the Rectangle:
- The rectangle contributes its two horizontal sides, each 4 inches long.
- Total for the rectangle’s horizontal sides:
-
Total Perimeter: Adding the semicircles' and rectangle's contributions:
Final Answer:
The perimeter of the figure is 20.56 inches.
Would you like a breakdown of a specific step? Let me know!
Here are 5 related questions to deepen understanding:
- How do we calculate the circumference of a circle using its radius?
- Why does the figure's semicircles form a full circle when combined?
- What is the formula for the perimeter of a composite shape like this?
- How would the solution change if the rectangle’s dimensions were different?
- Can you identify similar composite figures in real-world applications?
Tip: Always verify whether the curves in composite shapes combine to form a full circle or fraction thereof for accurate calculations!
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Math Problem Analysis
Mathematical Concepts
Geometry
Composite Shapes
Perimeter Calculation
Formulas
Circumference of a Circle = 2 * pi * r
Perimeter of Composite Shape = Sum of All Edges
Theorems
Circle Circumference Formula
Suitable Grade Level
Grades 6-8
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