Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Mathematics (https://www.askmehelpdesk.com/forumdisplay.php?f=199)
-   -   Circle Central Angles (https://www.askmehelpdesk.com/showthread.php?t=343141)

  • Apr 18, 2009, 02:42 PM
    Lightning55
    Circle Central Angles
    I'm having trouble figuring out what a particular question asks for.

    If you have a circle with a radius of 5 and a central angle of 2.8 (there are no units, no degrees or radians, which is what primarily confuses me), what is the arc length that is intercepted by the central angle?
  • Apr 18, 2009, 04:00 PM
    Perito

    The radius is 5 units (cm, m, in, ft, whatever), the diameter is, therefore, 2πR = 10π or about 31.42 units. The central angle is 2.8, therefore you have



    There are 360 degrees (2π radians) in a circle. So you can figure out the number of degrees or raidians by multiplying by one or the other





    The units are irrelevant.
  • Apr 18, 2009, 08:17 PM
    Lightning55

    Ah I see. I got the .0891 after I posted the question, but I had no idea that you could convert it like that. Thanks a lot :) It opens a new door in mathematics for me.

  • All times are GMT -7. The time now is 03:22 PM.