A Circle of radius 7 cm7 \text{ cm} is inscribed in a Square. Find area of the shaded region. Use π=22/7\pi = 22/7. 196−154=42 cm2196 - 154 = 42 \text{ cm}^2 (circle, square, radius, area, inscribed)

Answer: The area of the shaded region is 42 cm242 \text{ cm}^2.

Step-by-step solution

Step 1: Determine the side length of the square

When a circle is inscribed in a square, the diameter of the circle is equal to the side length of the square. Since the radius of the circle is given as 7 cm7 \text{ cm}, the diameter will be 2×7 cm=14 cm2 \times 7 \text{ cm} = 14 \text{ cm}. Therefore, the side length of the square is 14 cm14 \text{ cm}.

Step 2: Calculate the area of the square

The area of a square is calculated by squaring its side length. With a side length of 14 cm14 \text{ cm}, the area of the square is 142=196 cm214^2 = 196 \text{ cm}^2.

Step 3: Calculate the area of the circle

The area of a circle is calculated using the formula πr2\pi r^2. Given the radius r=7 cmr = 7 \text{ cm} and π=227\pi = \frac{22}{7}, the area of the circle is 227×(7 cm)2=227×49 cm2=22×7 cm2=154 cm2\frac{22}{7} \times (7 \text{ cm})^2 = \frac{22}{7} \times 49 \text{ cm}^2 = 22 \times 7 \text{ cm}^2 = 154 \text{ cm}^2.

Step 4: Calculate the area of the shaded region

The shaded region represents the area of the square that is not covered by the circle. To find this area, we subtract the area of the circle from the area of the square. So, 196 cm2−154 cm2=42 cm2196 \text{ cm}^2 - 154 \text{ cm}^2 = 42 \text{ cm}^2.

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