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2026年比较好的泸州塑料设备焊接工程用户口碑推荐厂家-泸州欧亚达防腐设备有限公司

To solve the problem of finding the shaded area in a square of side length 2, we assume the common scenario where the shaded region consists of four "petals" formed by intersecting semicircles drawn on each side of the square as diameters. Here's the step-by-step calculation:

Step 1: Area of the Square

The square has side length 2, so its area is:
[ \text{Area of square} = 2 \times 2 = 4 ]

Step 2: Total Area of the Semicircles

Each side of the square is the diameter of a semicircle (radius = 1). There are 4 semicircles, so the total area of these semicircles is:
[ \text{Total area of semicircles} = 4 \times \left( \frac{1}{2} \pi r^2 \right) = 4 \times \left( \frac{1}{2} \pi (1)^2 \right) = 2\pi ]

Step 3: Area of the Shaded Petals

The semicircles cover the square plus the petals (each petal is counted twice). Thus, the area of the petals is the difference between the total area of the semicircles and the area of the square:
[ \text{Area of petals} = 2\pi - 4 ]

Answer: (\boxed{2\pi - 4}) (or approximately 2.28 if numerical value is needed, but the exact form is (\boxed{2\pi - 4})).

(\boxed{2\pi - 4})

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作者声明:本文包含人工智能生成内容。

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