Write the standard form of the equation of the circle.Center (0, 0), r = 2

A. x2 + y2 = 4
B. x2 + y2 = 2
C. (x - 2)2 + (y - 2)2 = 2
D. (x - 2)2 + (y - 2)2 = 4


Answer: A

Mathematics

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