Find the length of the arc when:
r = 55 inches, theta = 50 degrees

Question

Find the length of the arc when:
r = 55 inches, theta = 50 degrees

anonymous · Answer

$$\theta=\frac{ l }{ r },\theta ~is ~\in~radians.$$

matimaticas · Answer

@surjithayer what is the l in that formula?

anonymous · Answer

$$180~ degree=\pi~ radians. $$
$$l=r \theta ,l=length~ of~ arc$$

matimaticas · Answer

well the answer choices are 
A. 46.15 inches
B. 49.29 inches
C. 48 inches
D. 50.43 inches

noelgreco · Answer

Until you memorize formulas, the easiest way to think of arc length is to consider the fraction of the circumference with which you're dealing.

$$2 \pi r=C$$
Fraction of circumference is 50/360 degrees.  Multiply that by the circumference for arc length.

noelgreco · Answer

Remember, you only have two significant figures, so you have to round

jhannybean · Answer

To convert from degrees to radians : $50 \ \cdot \frac{\pi}{180}$

Just saying :P

jhannybean · Answer

If that's useful in anyway for you.

matimaticas · Answer

I got 48 :) thanks... all of you

anonymous · Answer

can someone help me

jhannybean · Answer

Put up your own question in your own thread :)

anonymous · Answer

okay sorry just my first time don't know how to use this

jhannybean · Answer

that's ok! Don't worry :)