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back to boardShow all messages Hide all messagesWA10 help Giorgi Saghinadze (Tbilisi SU) 28 Feb 2007 21:57 I have WA 10.
I think I can't find coordinates center of circle very well. I think I have presision error. because in my solution I use numbers which maybe become larger than maxlongint;
if we have points. x1,y1 and x2,y2 and they are located at circle. how we can find coordinates cenrte of circle ?
sorry for my bad English There are great number of ways to define circle by two points on it. One of these: (x1 + x2)/2, (y1 + y2)/2, isn't it :) One of these: (x1 + x2)/2, (y1 + y2)/2, isn't it :) yes of course. but I missed one thing. radius should be fixed. we have points at circle x1,y1,x2,y2 and r. find the centre point of cirle which radius is r. :) how can I do it? For example, you can consider isosceles triangle (two original points and center). You can also solve two equations: dist(p, p1) = r and dist(p, p2) = r in coordinats (but I think first way is simpler). |
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