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
Q. 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
Understand Relationship: Understand the relationship between arc length, radius, and central angle in radians. The formula that relates arc length s, radius r, and central angle in radians θ is s=rθ.
Plug in Values: Plug in the given values into the formula.We are given the arc length s=40 inches and the radius r=20 inches. We need to find the central angle in radians, θ.So, we have 40=20θ.
Solve for θ: Solve for θ.To find θ, we divide both sides of the equation by 20.θ=2040θ=2
Check for Errors: Check for any possible math errors. We have used the correct formula and performed the division correctly.
Round Answer: Round the answer to the nearest tenth, if necessary.Since θ=2 is already to the nearest tenth, no further rounding is needed.
More problems from Find the radius or diameter of a circle