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Geometry 21 Online
OpenStudy (anonymous):

which is an equation of the circle whose center is the origin and whose radiues is 4 ? 1. y=x^2+8 2. x^2+y^2=16 3. x^2+y^2=4 4. x+y=8 i think is number 2 but if anyone can explain me

OpenStudy (anonymous):

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