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Equation of circle with given dianeters

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Aburoyhan
 
Reply Sun 11 Oct, 2015 05:56 am
If the equations of the two diameters of a circle are x - y =5 and 2x + y = 4 while the radius of the circle is 5, find the equation of the circle
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Type: Question • Score: 0 • Views: 571 • Replies: 1
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fresco
 
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Reply Sun 11 Oct, 2015 08:56 am
@Aburoyhan,
solve the diameter equations as a simultaneous pair which will give you (a,b) the co-ordinates of the centre of the circle (where diameters intersect)
then use (x-a)sqd +(y-b)sqd =r sqd to get equation of circle.
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