1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Find two points

  1. Nov 15, 2009 #1
    hi everyone !

    we have two circles that does'nt have intersections now we want to find a point on each circle that the distance of this two points are 'k' please help me . . .
     
  2. jcsd
  3. Nov 15, 2009 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    welcome to pf!

    hi mamali! welcome to pf! :wink:

    Is this an old-fashioned Euclidean geometry question, or are we allowed to use Cartesian (x and y) coordinates?

    Either way, you have to do some of the work yourself …

    show us what you've tried. :smile:
     
  4. Nov 15, 2009 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Let the radii of the two circles be [itex]r_1[/itex] and [itex]r_2[/itex] and the distance between the centers be R. Then there cannot be a point on one circle and a point on the other so that the distances between the points is less than [itex]R- (r_1+ r_2)[/itex] nor greater than [itex]R+ (r_1+ r_2)[/itex]. Do you see why? For distances between those numbers, as tiny-tim says, we would have to see how you would approach this problem yourself so we can know what kinds of hints will help.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook