1. Not finding help here? Sign up for a free 30min 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!

Radius of a circle

  1. Dec 15, 2008 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    Why is there negative on h-2k+2?and a denominator of negative square root of 5?
    also in 2h-k-17, it has a negative sign but the denominator is not negative square root of 5? I really don't understand this part... please explain :frown:

    3. The attempt at a solution
  2. jcsd
  3. Dec 15, 2008 #2


    User Avatar
    Homework Helper

    In this problem center of the circle lies between the two tangents. In such cases, to find the perpendicular distances, you have to make the constant C in the tangent positive.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Radius of a circle
  1. Radius of a circle (Replies: 2)

  2. Radius of a circle (Replies: 10)

  3. Radius of Circle (Replies: 2)