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Center point of circle

A. [x1+x2]/2; [y1+y2]/2; [z1+z2]/2
B. [x1-x2]/2; [y1-y2]/2; [z1-z2]/2
C. [x1-x2]; [y1-y2]; [z1-z2]
D. [x2-x1]; [y2-y1]; [z2-z1]
Answer» B. [x1-x2]/2; [y1-y2]/2; [z1-z2]/2


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