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;)

## Answer This Question

## Related Questions

- apex geometry - Hannah constructed two similar circles as seen in the image ...
- math - Find the radius of the circle if an arc of length 8 ft on the circle ...
- math advanced functions - a) Determine the measure of the central angle that is ...
- Geometry - If a central angle of 90 degrees defines an arc on circle R that has ...
- algebra - of radius 54 meters subtended by the central angle 1/9 radian. s(arc ...
- math - Whats the difference between an arc [of a circle]'s length and measure? ...
- Math Arc Length - Find the arc length corresponding to an angle of a degrees on ...
- Trig - Find the radian measure of the central angle of a circle of radius r that...
- Trig - Find the arc length of a circle that has a central angle of 270 degrees ...
- Trigonometry - FInd the arc length intercepted by a central angle of 46 degrees ...

More Related Questions