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
Q. 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
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, where L is the arc length, r is the radius, and θ is the central angle in radians. First, we need to convert the angle from degrees to radians.
Calculate Radians: To convert degrees to radians, we use the conversion factor 180π. So, 103∘×180π radians is the angle in radians.
Find Radius Formula: Performing the calculation: 103×180π=180103π radians.
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, we get r=θL.
Perform Calculation: Substitute the known values into the formula: r=180103π5 inches.
Calculate Numerical Value: Perform the calculation: r=103π5×180 inches.
Approximate Pi: Using a calculator to find the numerical value: r≈103π900 inches.
Final Calculation: Approximating π as 3.14159 and performing the division: r≈324.07977900 inches.
Round Result: Final calculation gives: r≈2.775 inches.
Round Result: Final calculation gives: r≈2.775 inches.Round the result to the nearest tenth of an inch: r≈2.8 inches.