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ineedhelponmyhw
 3 years ago
if arc AB measures 155 degrees (14 cm), what is the length of the radius of the circle, to the nearest hundredth? drawing.........
ineedhelponmyhw
 3 years ago
if arc AB measures 155 degrees (14 cm), what is the length of the radius of the circle, to the nearest hundredth? drawing.........

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ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1342158548525:dw

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0my teacher says the answer is 5.71 (the radius)

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0...i just dont know how to solve it

Wired
 3 years ago
Best ResponseYou've already chosen the best response.1http://en.wikipedia.org/wiki/Arc_(geometry) \[\frac{arc degree}{360}=\frac{arclength}{circumference}\] http://en.wikipedia.org/wiki/Arc_(geometry) \[\frac{arc degree}{360}=\frac{arclength}{circumference}\] \[\frac{155}{360}=\frac{14}{2\pi*r}\] Using cross multiplication: \[155*2\pi*r=14*360\] Solve for r. Note: I got 5.17, so someone wrote it down wrong (either you or the teacher!)

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0lol i was just going to ask if i could cross multiply

Wired
 3 years ago
Best ResponseYou've already chosen the best response.1No problemo. Google FTW :)

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0and teachers says to NOT use wikipedia.

Wired
 3 years ago
Best ResponseYou've already chosen the best response.1Probably because it's not a truly vetted source. It is better to use your book to find the equation. If you google something (e.g. arc length) and find multiple pages on the net have the same equation, then you're probably good. Having said that your book is always your best source!

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0i dont have a book, i have online schooling and its a test so i cant go back to look at how to solve it.

Wired
 3 years ago
Best ResponseYou've already chosen the best response.1Why'd the teacher tell you the answer to a test question?

ineedhelponmyhw
 3 years ago
Best ResponseYou've already chosen the best response.0so i could learn how to solve it.
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