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12 cards from this deck
Set of points at fixed distance (radius) from fixed point (centre)
x2+y2=r2x^2 + y^2 = r^2x2+y2=r2
(x−h)2+(y−k)2=r2(x-h)^2 + (y-k)^2 = r^2(x−h)2+(y−k)2=r2
x2+y2+2gx+2fy+c=0x^2 + y^2 + 2gx + 2fy + c = 0x2+y2+2gx+2fy+c=0
(−g,−f)(-g, -f)(−g,−f)
r=sqrtg2+f2−cr = sqrt{g^2 + f^2 - c}r=sqrtg2+f2−c
hhh (the xxx-coordinate of centre)
kkk (the yyy-coordinate of centre)
Substitute its coordinates into the circle's equation
Complete the square for xxx and yyy terms
Tangents, chords, intersections with lines
(3,−4)(3, -4)(3,−4)
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