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Geometry 19 Online
OpenStudy (anonymous):

In the diagram below, what is the approximate length of the minor arc AB? Please help. I'll post picture below.

OpenStudy (anonymous):

OpenStudy (anonymous):

ok I cant do this the math way but I can use my common sense to eliminate some of the answer choices. u can do that too. which ones would u eliminate??

OpenStudy (anonymous):

Mmm. I would say A, c. I'm over confuse.

OpenStudy (anonymous):

ok I would eliminate A since the measure givin is way to small compared to the 5 cm. then I would eliminate C since it is way to long compared to the 5 cm. the 2 lines are really close in measure so best would be b or d. and if u got a ruler next to u, u could figure it out even better.

OpenStudy (anonymous):

it wont be exact but pretty close

OpenStudy (anonymous):

B or D, this hard :/. This is my last chance.

OpenStudy (anonymous):

im pretty sure it is b since the lines are pretty much almost the same length!! ;)

OpenStudy (anonymous):

Formula for Arc Length is: Radius x Theta. Radius being 5 and Theta being 72 degrees which needs to be converted to radians by using (72pi/180) which comes out to 2pi/5, or roughly 1.2. Going back to the formula 1.2 x 5 would give the answer 6 but when accounting for the decimal places you get 6.2 which rounds up to 6.3.

OpenStudy (anonymous):

damn but I was close

OpenStudy (anonymous):

and I only used common sense since I didn't know how tho do it

OpenStudy (anonymous):

So answer is 6.3?

OpenStudy (anonymous):

yes it is

OpenStudy (anonymous):

Jeez thanks!

OpenStudy (anonymous):

I tried my best and @xanny6 is the genius who knew the answer

OpenStudy (anonymous):

Mhm. Thanks you both, y'all the best. Btw Milena you did help understand this better.

OpenStudy (anonymous):

I did?? well, thank u, and ur welcome

OpenStudy (anonymous):

well now if u don't know how to do them eliminate some answer choices :) lol

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