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Coordinate Geometry
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Circle Theorems
Maths > Pure > Coordinate Geometry
3 cards
Cards (7)
The equation of a circle with
centre
(a,b) and radius r is:
(x-a)^2 + (y-b)^
2
= r ^
2
If b^2-4ac
>0
2
real
roots
If b^2-4ac
=0
1 repeated
root
If b^2-4ac
<0
no
real
roots
See all 7 cards