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Write the equation of the circle whose center is at the origin and whose diameter is 12.
 one year ago
 one year ago
Write the equation of the circle whose center is at the origin and whose diameter is 12.
 one year ago
 one year ago

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krkistaBest ResponseYou've already chosen the best response.1
x^2 + y^2 = r^2 is the general formula for a circle with the center in [0,0] Thus, \[x^2 + y^2 = 12^2\] \[x^2 + y^2 = 144\]
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
the general form a a circle centered at \((a,b)\)\[(xa)^2+(yb)^2=r^2\]
 one year ago

phiBest ResponseYou've already chosen the best response.1
This was (a little bit) of a trick question. They tell you the diameter is 12. But you need the radius, which is 1/2 of the diameter. The radius is 6
 one year ago
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