III. Give the coordinates of the center of a circle and the length of its radius.
1. x2 + y2 - 100 = 0
2. (x - 5)2 + (y + 4)2 = 10
3. (x - 1)2 + (y + 1)2 = 4
Center:
Center:
Center:
Radius:
Radius:
Radius:

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