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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

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

Thanks

- Jane
**Posts:**0**Joined:**Tue Mar 19, 2013 8:47 pm

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!!

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
**Posts:**268**Joined:**Mon Jan 28, 2013 8:03 pm

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