OpenStudy (anonymous):

If the length of an arc is 12 inches and the radius of the circle is 10 inches, what is the measure of the arc? 216 degrees 270 degrees 288 degrees

3 years ago
OpenStudy (mertsj):

Find the circumference of the circle first. What is it?

3 years ago
OpenStudy (anonymous):

umm. i dont know?

3 years ago
OpenStudy (mertsj):

Circumference = 2 pi r Find the circumference

3 years ago
OpenStudy (anonymous):

75.36

3 years ago
OpenStudy (mertsj):

Do you have a calculator?

3 years ago
OpenStudy (anonymous):

just kidding

3 years ago
OpenStudy (anonymous):

its actually 62.8

3 years ago
OpenStudy (anonymous):

yes i do

3 years ago
OpenStudy (mertsj):

So if the arc is 12, it is this part of the circle: 12/62.8

3 years ago
OpenStudy (mertsj):

So the measure of the arc will be that part of the entire circle which is 360 degrees. So multiply that fraction by 360

3 years ago
OpenStudy (anonymous):

i get 30/157 ?

3 years ago
OpenStudy (mertsj):

|dw:1391131814233:dw|

3 years ago