Question

Hello, I have a question for Pre-Calc. Is there anyone that can help me?

Answer 1

I can help what's your question?

Answer 2

Use the arc length formula and the given information to find s. Show your work for full credit.
r = 20 ft θ = 19° s = ?

This is the equation that I was given for my assessment. I know that I have to use the equation s = r x angle of radians (theta), and I changed theta into radians which is 19 times pi/180, but I don't know where to go from there. I know that 19 times pi/180 is 0.105pi but what would I do after that? Just multiply it by 20, because I'd get 2.11 repeated which would be just 2.11 but I have a feeling that it isn't right.

Answer 3

Hint: s=rθ

Answer 4

s= 2.11 pi

or about 6.63

Answer 5

I got 2.10 pi but I'm not gonna argue with the moderator

Answer 6

It depends on what point in the calculation you rounded

Answer 7

19 degrees= pi*19/180= 0.105pi now 0.105*pi radians have to be multiplied to 20 to get the arc length

Answer 8

So the answer would be 2.111111111 or if you want to round to be somewhat precise and or accurate, the arc would be 2.10. Alright, that's a wrap on that one, I thank you all.

Answer 9

Anytime! :)

Answer 10

don't forget to multiply by pi

Answer 11

Ah, so the answer is actually 6.632251186 or in this case, 6.63.

Answer 12

in other words, 19º is about 0.3316 radians
(people often write it as a number times pi, for example 0.1055 pi, but if you multiply it out you get 0.3316 radians)

Answer 13

**Ah, so the answer is actually 6.632251186 or in this case, 6.63***
yes, but you should include the units

the arc length is (about) 6.63 feet

Answer 14

Understood, thank-you very much.

Answer 15

so figuring out arc length is easy if you know the angle in radians, (and of course the radius)