Arc

The radius of the circle with a central angle of http://webwork.mathstat.concordia.ca...219fe87b11.png that intercepts an arc with length 9 miles is miles.

I came up with 2.02 miles
or 12.7 miles both seem wrong
but then if the formula is S=r(theta) and I would get 9=r(255) r=9/255 r=.035?
I am just not sure what to do?

is only valid if is in radians

can't I convert it by multiplying (pi/180)
So it would be 255(pi/180)= 4.45 radians

yes

which would then be 9/4.45=2.02 miles as my radius

Quote:

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Originally Posted by M670

which would then be 9/4.45=2.02 miles as my radius

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"seem wrong" now?

Quote:

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Originally Posted by skeeter

"seem wrong" now?

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I really can't see my mistake... in this question
The process looks good to me, I convert 255 degrees into radians then use the formula to derive 2.02 miles as my radius

Quote:

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Originally Posted by M670

I really can't see my mistake... in this question
The process looks good to me, I convert 255 degrees into radians then use the formula to derive 2.02 miles as my radius

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I think people who still use degrees, get what they deserve.
Let then .
You should get .