Math

posted by .

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 -

    Kathy/Julie -- please use the same screen name for your posts.

  • Math -

    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

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    Whats the difference between an arc [of a circle]'s length and measure?
  2. maths

    O is the centre of the circle and A and B are points on the circumference of the circle. The radians of the circle is 12 cm and the angle AOB is 54 degrees. Choose the one option which gives the length of the circle joining A and B …
  3. trigonometry

    please check my answers. 1.Find the area of the sector of a circle. r=11.8cm, theta-pi/7 radians I got 31.2cmsquared 2.Find the radius of a circle in which a central angle of pi/6radian determines a sector of area 76square meters. …
  4. trig

    in a circle of radius 26, find the length of the arc spanned by a central angle of pi/4 radians. round your answer to 2 decimal places. use 3.1416 as an approx for pi.
  5. maths

    an arc of a circle subtends a central angle of 5pi/6 radians.if the radius of the circle measures 10.6cm, determine the approx measure of the arc leanth
  6. math advanced functions

    a) Determine the measure of the central angle that is formed by an arc length of 5 cm in a circle with a radius of 2.5cm. Express the measure in both radians and degrees, correct to one decimal place. b) Determine the arc length of …
  7. Math rem

    2.Find the length of the arc in a circle if the radius of the circle is 24cm and the degree of the arc is 90o 3.Find the length of the arc if a circle if the degree if the arc is 120o and the length of the radius is 8cm. 4. A circle …
  8. math

    An angle of 1.8 radians at the center of the circle subtends an arc of length 23.4cm. Find: (a) The radius of the circle (b) The area of the sector enclosed by the arc and the radii.
  9. apex geometry

    Hannah constructed two similar circles as seen in the image below. If the arc length of the larger circle is , which of the following would be true?
  10. Physics

    We can measure angles in degrees or radians. When studying angular motion, we will tend to use radians. If you are looking at a portion of a circle, the angle in radians can be calculated by dividing the arc length by the radius of …

More Similar Questions