Oct 13, 2025 · Arc length is the distance between one endpoint of an arc on a circle to the other. In this article, we’ll tell you what formulas you need and how to use them to find a circle's arc …

In particular, the length of an arc of a circle of radius 'r' that subtends an angle θ at the center is calculated by the formula rθ × (π/180) if the angle is in degrees and if the angle is in radians, …

Jul 23, 2025 · We define arc length as measuring the length of a slice of pizza crust. Arc length is calculated using the simple formula: Arc Length= r × θ where 'r' is the radius of the circle and …

Aug 31, 2025 · We now return to our calculation of arc length and see the first instance in which measuring angles in radians is useful. To calculate an arc length, we need only multiply the …

To find the arc length, we can think about the arc as a portion of the circle's circumference. The circumference of the circle is. Recall that we defined radians as an angle measurement that …

In relation to the two arc length formulas seen on this page, both show that arc length, s, is expressed as "some value" times the radius, r. The arc length is proportional to the radius.

To calculate arc length without the angle, you need the radius and the sector area: Multiply the area by 2. Then divide the result by the radius squared (make sure that the units are the …

If the measure of the arc (or central angle) is given in radians, then the formula for the arc length of a circle is. Arc Length = θr. where θ is the measure of the arc (or central angle) in radians …

Calculate the arc length of a circle from its radius and central angle. Supports degrees and radians.

For radian measure: Take the central angle of the desired arc length (in radians), divide by 2*pi, and multiply by the circumference. For radian measure, this gives a simple formula: s = r*theta.