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Circle 
O shown below has an arc of length 5 inches subtended by an angle of 
103^(@).
Find the length of the radius, 
x, to the nearest tenth of an inch.
Answer: inches

Circle O O shown below has an arc of length 55 inches subtended by an angle of 103 103^{\circ} .\newlineFind the length of the radius, x x , to the nearest tenth of an inch.\newlineAnswer: \square inches

Full solution

Q. Circle O O shown below has an arc of length 55 inches subtended by an angle of 103 103^{\circ} .\newlineFind the length of the radius, x x , to the nearest tenth of an inch.\newlineAnswer: \square inches
  1. Convert to Radians: To find the length of the radius, we can use the formula for the length of an arc, which is L=rθ L = r \theta , where L L is the arc length, r r is the radius, and θ \theta is the central angle in radians. First, we need to convert the angle from degrees to radians.
  2. Calculate Radians: To convert degrees to radians, we use the conversion factor π180 \frac{\pi}{180} . So, 103×π180 103^{\circ} \times \frac{\pi}{180} radians is the angle in radians.
  3. Find Radius Formula: Performing the calculation: 103×π180=103π180 103 \times \frac{\pi}{180} = \frac{103\pi}{180} radians.
  4. Substitute Values: Now we can use the formula for the arc length with the angle in radians to find the radius. Rearranging the formula to solve for r r , we get r=Lθ r = \frac{L}{\theta} .
  5. Perform Calculation: Substitute the known values into the formula: r=5 inches103π180 r = \frac{5 \text{ inches}}{\frac{103\pi}{180}} .
  6. Calculate Numerical Value: Perform the calculation: r=5×180103π r = \frac{5 \times 180}{103\pi} inches.
  7. Approximate Pi: Using a calculator to find the numerical value: r900103π r \approx \frac{900}{103\pi} inches.
  8. Final Calculation: Approximating π \pi as 33.1415914159 and performing the division: r900324.07977 r \approx \frac{900}{324.07977} inches.
  9. Round Result: Final calculation gives: r2.775 r \approx 2.775 inches.
  10. Round Result: Final calculation gives: r2.775 r \approx 2.775 inches.Round the result to the nearest tenth of an inch: r2.8 r \approx 2.8 inches.

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