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January 15th, 2011, 02:40 PM  #1 
Newbie Joined: Jan 2011 Posts: 2 Thanks: 0  Finding origin of a circle from two straight line equations?
I need the origin of the circle from the two straight line equations. Show work please and give me pointers! 
January 15th, 2011, 03:11 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,485 Thanks: 2041 
The lines are mutually perpendicular, intersect at (1/2, 3/2) and the acute angle between each line and the yaxis (or xaxis) is 45°. Hence the lines and circle are symmetrical about the line y = 3/2 and four of the points shown in the diagram are the vertices of a square. You should find it easy to finish from there.


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circle, equations, finding, line, origin, straight 
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