Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Trig circle area proble.

  1. Mar 31, 2010 #1
    1. The problem statement, all variables and given/known data
    This is my own sketch of the problem. The radii are listed, and the circles are all tangent. I need to find the area of the blue part.

    2. Relevant equations



    3. The attempt at a solution
    I've been staring at this for hours. I really have no idea where to start. I'm just looking for a push in the right direction.

    Thanks for any help.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
    Last edited: Mar 31, 2010
  2. jcsd
  3. Mar 31, 2010 #2
    Join centers of the circles to form a triangle with sides of 11,9 and 10 units. As you can see this triangle contains blue part+ quarter of each circle.
    thus area of the blue part is:
    area of the triangle joining centers - 1/4*(area of each circle)
     
  4. Mar 31, 2010 #3
    Thanks a ton!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook