IB Maths Arc Length

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IB Maths Arc Length

Postby Jane » Sat Apr 13, 2013 4:41 am

IB Mathematics SL– Trigonometry, Mensuration, Arc Length


How can we find the length of an arc with central angle in a circle with radius 7 cm?


Thanks
Jane
 
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Re: IB Maths Arc Length

Postby miranda » Sat Apr 13, 2013 4:50 am

IB Maths SL – Trigonometry, Arc Length

Let (in radians) be the central angle in a circle with radius r, then the length of the arc cut off by is given by the following formula:



Therefore the arc length in our case is



Hope these help!!
miranda
 
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Re: IB Maths Arc Length

Postby Jane » Sat Apr 13, 2013 5:06 am

Thanks a lot!
Jane
 
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Joined: Tue Mar 19, 2013 8:47 pm


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