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In circle \( G \) with \( m \angle F G H=34^{\circ} \) and \( F G=10 \), find the area of sector FGH. Round to the nearest hundredth.

Ask by Kelly Pearson. in the United States
Mar 11,2025

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The area of sector FGH is approximately 29.65.

Solución

1. Since \(FG\) is a radius of circle \(G\) and \(FG = 10\), the radius \(r\) is \(10\). 2. The area of a sector with central angle \(\theta\) (in degrees) in a circle of radius \(r\) is given by \[ \text{Sector Area} = \frac{\theta}{360} \times \pi r^2. \] 3. Here, the central angle is \(\theta = 34^{\circ}\). Substitute the given values: \[ \text{Sector Area} = \frac{34}{360} \times \pi \times 10^2. \] 4. Simplify the expression: \[ \text{Sector Area} = \frac{34}{360} \times \pi \times 100 = \frac{3400\pi}{360} = \frac{85\pi}{9}. \] 5. Calculate the numerical value: \[ \frac{85\pi}{9} \approx \frac{85 \times 3.1416}{9} \approx \frac{266.8056}{9} \approx 29.6451. \] 6. Rounding to the nearest hundredth, the area is approximately \(29.65\). Thus, the area of sector FGH is approximately \(29.65\).

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Bonus Knowledge

To find the area of sector FGH in circle \( G \), we can use the formula for the area of a sector, which is given by: \[ \text{Area} = \frac{\theta}{360} \times \pi r^2 \] where \( \theta \) is the angle in degrees and \( r \) is the radius of the circle. In this case, \( \theta = 34^\circ \) and \( r = FG = 10 \). First, we calculate the area using the formula: \[ \text{Area} = \frac{34}{360} \times \pi \times (10)^2 \] Calculating \( 10^2 \): \[ 10^2 = 100 \] Now substitute back into the formula: \[ \text{Area} = \frac{34}{360} \times \pi \times 100 \] Simplifying \( \frac{34}{360} \): \[ \frac{34}{360} = \frac{17}{180} \] So we can write: \[ \text{Area} = \frac{17}{180} \times \pi \times 100 = \frac{1700 \pi}{180} \] Now simplifying \( \frac{1700}{180} \): \[ \frac{1700}{180} = \frac{85}{9} \] Now substituting for \( \pi \approx 3.14159 \): \[ \text{Area} \approx \frac{85}{9} \times 3.14159 \approx 29.577 \text{ (approximately)} \] Rounding to the nearest hundredth: \[ \text{Area} \approx 29.58 \] Thus, the area of sector FGH is approximately \( \boxed{29.58} \).

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