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    A circle passes through the points (2,0) and (8,0) and has the y axis as a tangent. What is the 2 equations for the cirlce.
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    Is there no simultaneous equation with it? Usually you'd put the two intercepts into the simultaneous equation and the solutions for them both would be your two solutions
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    (Original post by L_Azazel)
    A circle passes through the points (2,0) and (8,0) and has the y axis as a tangent. What is the 2 equations for the cirlce.
    Do you recall the fact that the equation of a circle is (x-a)^2 + (y-b)^2 = r^2?

    What does the circle being tangent to the y-axis imply? Try drawing a sketch.
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    Moved to maths.
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    (Original post by Zacken)
    Moved to maths.
    Yes I recall, but I don't know the centre?
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    (Original post by Zacken)
    Do you recall the fact that the equation of a circle is (x-a)^2 + (y-b)^2 = r^2?

    What does the circle being tangent to the y-axis imply? Try drawing a sketch.
    (Original post by L_Azazel)
    Yes I recall, but I don't know the centre?
    (x-a)^2 + (y-b)^2 = r^2 <---- the x and y in those are the centre of the circle co-ordinates
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    (Original post by thefatone)
    (x-a)^2 + (y-b)^2 = r^2 <---- the x and y in those are the centre of the circle co-ordinates
    No they're not, that's a and b. :-)
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    (Original post by Zacken)
    No they're not, that's a and b. :-)
    oh yea xD
 
 
 
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