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10 cards from this deck
Set of all points equidistant from a fixed centre point
(x−a)2+(y−b)2=r2(x - a)^2 + (y - b)^2 = r^2(x−a)2+(y−b)2=r2
x2+y2=r2x^2 + y^2 = r^2x2+y2=r2
The centre of the circle
r2=(x−a)2+(y−b)2r^2 = (x-a)^2 + (y-b)^2r2=(x−a)2+(y−b)2
Convert general form to standard form to find centre and radius
Replace x with (x - h)
Replace y with (y - k)
Midpoint of S and T
90°
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