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1. 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.
2. 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
3. (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.
4. Moved to maths.
5. (Original post by Zacken)
Moved to maths.
Yes I recall, but I don't know the centre?
6. (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
7. (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. :-)
8. (Original post by Zacken)
No they're not, that's a and b. :-)
oh yea xD

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