Wednesday
October 22, 2014

Homework Help: maths

Posted by Anonymous on Sunday, February 24, 2008 at 10:38am.

1) Circle centre (7,-2) passes through (-2,10). Calculate radius and find equation of circle.

2) AB is diameter of circle A(9,5) B(-1,-7). Find equation of circle mid point.
I know i have to use the eqn (x1+x2)/2 and (y1+y2)/2

3) Find the equation of circle with centre (-8,5). Which has y axis as tangent. Find equation of circle.
?? (x+8)+(y-5)=r ??

Please help!

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