Question about circle arc length formula

In summary, the formula for the length of an arc that subtends a central angle can be expressed as AC/360, where A represents the central angle and C represents the circumference. This formula is correct and is supported by simple logic. The length of a segment of a circle with a given radius is proportional to the central angle.
  • #1
shadowboy13
20
0
Now i haven't checked yet whether or not this is correct, but the formula for the length of an arc that subtends a central angle can also be expressed this way: [tex]AC/360[/tex]

Where:
A: Central Angle
C: Circumference

Is this correct?

Thank you for your help.
 
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  • #2
shadowboy13 said:
Now i haven't checked yet whether or not this is correct, but the formula for the length of an arc that subtends a central angle can also be expressed this way: [tex]AC/360[/tex]

Where:
A: Central Angle
C: Circumference

Is this correct?

Thank you for your help.

Well you tell me. Does the formula match up with what you'd expect if the central angle A = 360o? 180o? 90o? If it doesn't work for one of these values, then it can't be correct, but if it does work for all, then it's pretty good evidence that it could be correct if you also couple it with some simple logic. In other words, is this what you'd expect the arc length to be intuitively?
 
  • #3
Essentially what you are trying to say is that the length of a segment of a circle of given radius is proportional to the central angle. Yes, that's true.
 

Related to Question about circle arc length formula

What is the formula for calculating the length of an arc in a circle?

The formula for finding the length of an arc in a circle is:
L = (θ/360) * 2πr
Where L is the arc length, θ is the central angle in degrees, and r is the radius of the circle.

How do you find the arc length if the central angle is given in radians?

If the central angle is given in radians, the formula for finding the arc length is:
L = rθ
Where L is the arc length, r is the radius of the circle, and θ is the central angle in radians.

Can the arc length formula be used to find the circumference of a circle?

No, the arc length formula only calculates the length of a portion of the circumference, not the entire circumference itself. To find the circumference of a circle, you would use the formula C = 2πr.

Is the arc length formula the same for all types of circles?

Yes, the arc length formula can be used for any type of circle, including full circles, semicircles, and sector arcs. The only difference would be the value of the central angle (θ) used in the formula.

What is the difference between an arc length and a chord length?

An arc length is the portion of the circumference of a circle, while a chord length is the straight line distance between two points on the circumference. The arc length is always longer than the chord length, unless the chord is a diameter of the circle.

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