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Circle 
O shown below has a radius of 20 inches. Find, to the nearest tenth, the radian measure of the angle, 
x, that forms an arc whose length is 40 inches.
Answer: radians

Circle O O shown below has a radius of 2020 inches. Find, to the nearest tenth, the radian measure of the angle, x x , that forms an arc whose length is 4040 inches.\newlineAnswer: \square radians

Full solution

Q. Circle O O shown below has a radius of 2020 inches. Find, to the nearest tenth, the radian measure of the angle, x x , that forms an arc whose length is 4040 inches.\newlineAnswer: \square radians
  1. Understand Relationship: Understand the relationship between arc length, radius, and central angle in radians. The formula that relates arc length ss, radius rr, and central angle in radians θ\theta is s=rθs = r\theta.
  2. Plug in Values: Plug in the given values into the formula.\newlineWe are given the arc length s=40s = 40 inches and the radius r=20r = 20 inches. We need to find the central angle in radians, θ\theta.\newlineSo, we have 40=20θ40 = 20\theta.
  3. Solve for θ\theta: Solve for θ\theta.\newlineTo find θ\theta, we divide both sides of the equation by 2020.\newlineθ=4020\theta = \frac{40}{20}\newlineθ=2\theta = 2
  4. Check for Errors: Check for any possible math errors. We have used the correct formula and performed the division correctly.
  5. Round Answer: Round the answer to the nearest tenth, if necessary.\newlineSince θ=2\theta = 2 is already to the nearest tenth, no further rounding is needed.

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