
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
May 19th, 2013, 07:02 AM  #1 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Circles and Chords
I can't spot where I've gone on this one. Can anyone help me out? Many thanks. Q. Find the equation of the circle with centre in the 1st quadrant, if it touches the yaxis at the point (0, 2) & makes a chord of length 3 units on the xaxis. Attempt: If the circle touches the yaxis at (0, 2) then centre c = (x, 2), Perpendicular distance of c to xaxis = 2, Let ab = 1/2 length of chord on xaxis = 3/2, ac = , Thus, from yaxis, , Equation of circle: Ans. (From text book): 
May 19th, 2013, 07:31 AM  #2 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Re: Circles and Chords
I see where I went wrong. Radius should have been 5/2. Apologies.

May 19th, 2013, 07:47 AM  #3  
Math Team Joined: Nov 2010 From: Greece, Thessaloniki Posts: 1,989 Thanks: 133 Math Focus: pre pre pre pre pre pre pre pre pre pre pre pre calculus  Re: Circles and Chords Quote:
 
May 19th, 2013, 08:49 AM  #4  
Global Moderator Joined: Dec 2006 Posts: 20,004 Thanks: 1862  Quote:
 

Tags 
chords, circles 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Circles and Chords  bilano99  Algebra  3  May 20th, 2013 11:16 PM 
Number of possible guitar chords?  Taraalcar  Algebra  1  June 2nd, 2012 01:22 PM 
Equal areas defined by parallel chords in a circle  ballensr  Algebra  0  February 9th, 2012 10:51 AM 
Find the number of chords  stevecowall  Algebra  7  January 7th, 2012 08:26 AM 
Circles, Chords, and Right Triangles  jaj5118  Algebra  1  December 26th, 2010 05:17 PM 