Posted by **ted** on Saturday, July 21, 2012 at 8:41pm.

What is the arc length if the central angle is 225 degrees and the radius of a circle is 3 cm?

pls help. i don"t get it

- math grade 12 -
**MathMate**, Saturday, July 21, 2012 at 9:03pm
Arc length = rθ ...(1)

where r is radius and θ is central angle in radians.

To convert 225° to radians, multiply by (π/180) to get 225π/180=5π/4

Use formula (1) to calculate arc length, which should be in the same units as the radius.

- math grade 12 -
**monday**, Sunday, November 11, 2012 at 12:12pm
2*225*pie/360*3

should be the answer;)

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