- #1
A123
- 4
- 0
Homework Statement
http://education.Alberta.ca/media/9451970/07_math30-1_released_2014-15.pdf
question #7
Homework Equations
a=theta*r
The Attempt at a Solution
I did a=(5pi/6)*20 but the answer is not A
I think 'total perimeter' here means you go entirely around the area which is swept out by the wiper.A123 said:Homework Statement
http://education.Alberta.ca/media/9451970/07_math30-1_released_2014-15.pdf
question #7
Homework Equations
a=theta*r
The Attempt at a Solution
I did a=(5pi/6)*20 but the answer is not A
I agree with SteamKing's appraisal.SteamKing said:I think 'total perimeter' here means you go entirely around the area which is swept out by the wiper.
SteamKing said:I think 'total perimeter' here means you go entirely around the area which is swept out by the wiper.
The formula for finding arc length is s = rθ, where s is the arc length, r is the radius of the circle, and θ is the central angle in radians.
To convert degrees to radians, multiply the degree measure by π/180. For example, to convert 45 degrees to radians, we would do 45 * π/180 = π/4.
Arc length is the actual distance along the circumference of a circle, while arc measure is the central angle in radians that corresponds to that arc length.
No, the formula s = rθ only applies to circles. For other shapes, you would need to use different formulas to find the arc length.
If the central angle is given in degrees, you would need to convert it to radians first before using the formula s = rθ. You can do this by multiplying the degree measure by π/180.