Posted by **Kathy** on Thursday, August 4, 2011 at 9:59pm.

The arc length of a circle created by an angle of pi/3 radians is 2.5 cm. The radius of the circle is approx...

a. o.419 cm

b. 2.387 cm

c. 1.783 cm

d. 0.581 cm

Please explain how you got the answer. Thanks! :)

- Math -
**Ms. Sue**, Thursday, August 4, 2011 at 10:08pm
Kathy/Julie -- please use the same screen name for your posts.

- Math -
**Reiny**, Thursday, August 4, 2011 at 10:09pm
arc = rØ , where r is the radius and Ø is the central angle.

2.5 = r(π/3)

r = 7.5/π or appr. 2.387

## Answer This Question

## Related Questions

- maths - an arc of a circle subtends a central angle of 5pi/6 radians.if the ...
- apex geometry - Hannah constructed two similar circles as seen in the image ...
- math - An angle of 1.8 radians at the center of the circle subtends an arc of ...
- math - Whats the difference between an arc [of a circle]'s length and measure? ...
- trig - in a circle of radius 26, find the length of the arc spanned by a central...
- Physics - We can measure angles in degrees or radians. When studying angular ...
- Math rem - 2.Find the length of the arc in a circle if the radius of the circle ...
- math advanced functions - a) Determine the measure of the central angle that is ...
- trigonometry - please check my answers. 1.Find the area of the sector of a ...
- maths - O is the centre of the circle and A and B are points on the ...

More Related Questions