Radius of circle:
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- \[ S_9 = 3(9)^2 + 5(9) = 243 + 45 = 288 \]
- #### 62
- A circle is inscribed in a square with side length 14 cm. Calculate the area of the circle in square centimeters, then determine the area of the square not covered by the circle.
- \[ r = \frac{14}{2} = 7 \text{ cm} \]
- Area of circle:
- \[ \pi r^2 = \pi \times 49 \approx 153.94 \text{ cm}^2 \]
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