Math Problem Statement
Solution
The composite shape in the image consists of a central square and four quarter-circles at the corners. Let’s break the shape down step by step to calculate both the perimeter and the total area.
Step 1: Central Square
- Side of the square = 8 inches
- Area of the square = .
Step 2: Quarter-Circles
- Each quarter-circle has a radius of 4 inches (as indicated on the diagram).
- Area of one full circle = .
- Since each quarter-circle is of a full circle, the area of one quarter-circle is:
- There are 4 quarter-circles, so the total area of the circular parts is:
Step 3: Total Area
- Total area of the composite shape = Area of the square + Area of the quarter-circles
Step 4: Perimeter
- The perimeter consists of the curved parts of the four quarter-circles. Together, these four quarter-circles form a complete circle.
- The circumference of the full circle formed by the quarter-circles is:
Thus, the perimeter of the shape is 25.12 inches.
Conclusion:
- The correct answer is Perimeter = 25.12 inches, Area = 114.24 square inches. None of the provided options seem to exactly match this result, but based on the problem-solving process, this would be the accurate calculation.
Would you like any details or further clarifications? Here are five related questions:
- How do we handle composite shapes with more complex geometries?
- Why does the perimeter calculation only consider the curved parts and not the straight edges?
- How can we verify the results using an approximation of ?
- How would the solution change if the central square was larger or smaller?
- What happens to the area if the radius of the quarter-circles is doubled?
Tip: When dealing with composite shapes, always split them into familiar basic shapes (like circles, squares, or triangles) to simplify the calculations.
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Math Problem Analysis
Mathematical Concepts
Geometry
Composite Shapes
Circle
Perimeter
Area
Formulas
Area of a square = side^2
Area of a circle = π × r^2
Perimeter of a circle = 2πr
Theorems
Formula for area and perimeter of circles and squares
Suitable Grade Level
Grades 7-9
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