姓名 ______________________日期 ____________得分 ____ / 12
圆的方程练习
圆的方程 · 1–12
写出方程，或求圆心和半径。
1.(x − 4)2 + (y + 4)2 = 81
2.(x + 9)2 + (y − 8)2 = 9
4.(x + 5)2 + (y − 5)2 = 1
5.(x + 4)2 + (y + 7)2 = 81
6.(x + 5)2 + (y − 6)2 = 16
7.(x + 4)2 + (y − 2)2 = 4
8.(x − 2)2 + (y + 7)2 = 16
9.(x − 9)2 + (y − 1)2 = 49
10.(x + 7)2 + (y − 1)2 = 49
11.(x + 9)2 + (y + 1)2 = 9
12.(x − 4)2 + (y + 9)2 = 36
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