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anonymous
 one year ago
find the length of the radius of circle c.
http://media.education2020.com/evresources/2092539_2f57b746c73f4a4b8c7ece9ee207b927.png
anonymous
 one year ago
find the length of the radius of circle c. http://media.education2020.com/evresources/2092539_2f57b746c73f4a4b8c7ece9ee207b927.png

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0A. r=1 B. r=3 C. r=12 D. r=15

dan815
 one year ago
Best ResponseYou've already chosen the best response.2okay that angle you see is actually in radians

dan815
 one year ago
Best ResponseYou've already chosen the best response.2when they say 4/9 pi they really mean 4/9 pi radius is our angle

dan815
 one year ago
Best ResponseYou've already chosen the best response.2that means this angle you see subtends a total of 4/9 pi radius units on the circumference of the circle

dan815
 one year ago
Best ResponseYou've already chosen the best response.2\[\frac{4}{9}\pi * r =\frac{20}{3} \pi \]\

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1arc length = radius* theta

dan815
 one year ago
Best ResponseYou've already chosen the best response.2dont let radians confuse you, its a very simple idea, we are saying the angle in terms of the radius units thats why there are 2pi radians in a circle beacuse the circumference of a circle is 2 pi r

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1yeah , i was looking for a easy explination that @dan815 just said... http://www.themathpage.com/atrig/arclength.htm
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