Circles Flashcards by Geralt Hwa

Q

Midpoint

A

[(X1+x2)/2], [(y1+y2)/2]

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Q

Equation of a circle

A

(x-a)^2 + y-b)^2 = r^2

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Q

Tangent rule

A

A tangent to a circle is perpendicular to the radius at thr point of intersection

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