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Name _____________________________
Date ___________________

Conics
(Answer ID # 0518029)
Write the standard equation, the center, and the radius for each circle.

1.  
x2  +  y2  =  
1

64

2.  
x2  +  y2  =  81

3.  
x2  +  y2  =  49

4.  
x2  +  y2  =  
1

16

5.  
-x2  -  y2  +  36  =  0

6.  
-3x2  -  3y2  +  21  =  0

7.  
x2 + y2 + 6y + 1  =    0  

8.  
x2 + y2 - 18x - 18y + 157  =    0  

9.  
x2 + y2 + 12x + 2y + 37  =  
4

9

10.  
x2 + y2 + 16x + 64  =  
225

121

11.  
x2 + y2 - 4x + 10y + 29  =  
1

25

12.  
x2 + y2 + 2x + 12y + 37  =  
361

49

13.  
x2 + y2 + 6x - 16y + 73  =  
1

4

14.  
x2 + y2 + 14x - 8y + 65  =  
4

9

15.  
x2 + y2 - 8x + 14y + 57  =    0  

16.  
x2 + y2 - 10x + 4y + 27  =    0  


 


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