# Document 1280142

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Document 1280142
```Name: _____________________________________________________________
Date: _________________________
Period: ______
Chapter 8: Intro to Trig
Topic 7a: Arc Length
FORMULA:
=
Where:
S=

r=
=
If it’s not, convert:  =  ⋅
Examples:

180
1. In a circle with a radius of 3 centimeters, what is the length, in centimeters, of an arc intercepted by a
[1] 3
[2] 4
[3] 6
[4] 12
2.
Find the exact length of the arc created by the shaded region, from a central angle of
2
3
3. The protractor shown at the right has a radius of 2.5" and the angle AOB is measuring 450. What is
the length, x, along the outer edge to the nearest hundredth?

4. In a circle, a central angle of subtends an arc of 3 centimeters. Find the length of the radius of the
3
circle to the nearest tenth.
Name: _____________________________________________________________
Date: _________________________
8-7a Homework: Arc Length
All work is to be done in your notebook – not on this sheet
Period: ______
Find the exact value of each arc length: (remember… exact means no rounding, so stick with π)
1.
2.
Find the length of each arc to the nearest tenth: (use your π key at the very end to turn into a decimal)
3.
4.
5. Find, in centimeters, the length of an arc intercepted by a central angle of 4 radians in a circle with a