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Mathematics 8 Online
OpenStudy (eskelle):

Use the given circle. Find the length "s" to the nearest tenth

OpenStudy (eskelle):

OpenStudy (eskelle):

@vocaloid are you still online? you're so good at helping lol

jimthompson5910 (jim_thompson5910):

@eskelle are you able to find the circumference?

OpenStudy (eskelle):

um not really

jimthompson5910 (jim_thompson5910):

Or since the angle is given in radian mode, you can use the formula \[\Large s = \theta*r\] s = arc length \(\Large \theta\) = greek letter theta = central angle r = radius In this case, s = unknown \(\Large \theta = \frac{5\pi}{3}\) r = 9

OpenStudy (eskelle):

soo s=theta*9

OpenStudy (eskelle):

what is theta?

jimthompson5910 (jim_thompson5910):

So let's plug in the given theta and r values \[\Large s = \theta*r\] \[\Large s = \frac{5\pi}{3}*9\] \[\Large s = ???\]

jimthompson5910 (jim_thompson5910):

\(\Large \theta\) = greek letter theta = central angle In this case, \(\Large \theta = \frac{5\pi}{3}\)

OpenStudy (eskelle):

idk how to times 5pi/3 by 9

jimthompson5910 (jim_thompson5910):

type in `5pi/3*9` into a calculator http://web2.0calc.com/

OpenStudy (eskelle):

oh right i always forget i can use calculators lol

OpenStudy (eskelle):

i got 47.1

jimthompson5910 (jim_thompson5910):

correct \[\Large s \approx 47.1\]

OpenStudy (eskelle):

ok ty

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