How to find the length of an arc

Practice Questions

High School Math › How to find the length of an arc

Questions

6

1

Find the circumference of the following sector:

2

If a quarter of the area of a circle is $9\pi$ , then what is a quarter of the circumference of the circle?

3

$\textup{What is the length, in inches, of an arc with a central angle of }$

$72\textup{ degrees on a circle with a radius of 20 inches?}$

4

Find the arc length of a sector that has an angle of 120 degrees and radius of 3.

5

Circle

In the circle above, the angle A in radians is $\frac{\pi}{4}$

What is the length of arc A?

6

Figure not drawn to scale.

In the figure above, circle C has a radius of 18, and the measure of angle ACB is equal to 100°. What is the perimeter of the red shaded region?

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