Circle equation

(the database of solved problems)

All the problems and solutions shown below were generated using the Circle equation Calculator.

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ID	Problem	Count
3451	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 4 , 13 \right)} $ and radius $ \color{blue}{ 16 }$	2
3452	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -3 , 2 \right)} $ and radius $ \color{blue}{ 3 }$	2
3453	Find the center and radius of the circle $ x^2 + y^2 -8 x + 4 y + 15 = 0 $.	2
3454	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -4 , 2 \right)} $ and radius $ \color{blue}{ 8 }$	2
3455	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 9 , 0 \right)} $ and radius $ \color{blue}{ \sqrt{ 56 } }$	2
3456	Find the center and radius of the circle $ x^2 + y^2 + 8 x -y +1 = 0 $.	2
3457	Find the center and radius of the circle $ \left( x + 7 \right)^2 + \left( y + 4 \right)^2 = 81 $.	2
3458	Find the center and radius of the circle $ x^2 + y^2 + 4 x + 2 y -29 = 0 $.	2
3459	Find the center and radius of the circle $ x^2 + y^2 + 6 y -16 = 0 $.	2
3460	Find the center and radius of the circle $ \left( x + 7 \right)^2 + \left( y - 2 \right)^2 = 0 $.	2
3461	Find the center and radius of the circle $ \left(x - 22 \right)^2 + \left( y - 8 \right)^2 = 4 $.	2
3462	Find the center and radius of the circle $ x^2 + y^2 -10 x -10 y + 34 = 0 $.	2
3463	Find the center and radius of the circle $ x^2 + y^2 + 20 x + 20 y + 20 = 0 $.	2
3464	Find the center and radius of the circle $ x^2 + y^2 -40 x -16 y + 4 = 0 $.	2
3465	Find the center and radius of the circle $ x^2 + y^2 -20 x -8 y -4 = 0 $.	2
3466	Find the center and radius of the circle $ \left(x - 20 \right)^2 + \left( y - 8 \right)^2 = 16 $.	2
3467	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 2 , 1 \right)} $ and radius $ \color{blue}{ 2 }$	2
3468	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 0 , -5 \right)} $ passing throught the point $ \color{blue}{ P = \left( -\sqrt{ 60 } , -6 \right) } $.	2
3469	Find general equation of a circle with a center at $ \color{blue}{C = \left( 0 , 0 \right)} $ and radius $ \color{blue}{ 3 }$	2
3470	Find the center and radius of the circle $ \left( x + 3 \right)^2 + \left( y + 5 \right)^2 = 0 $.	2
3471	Find the center and radius of the circle $ \left( x + 3 \right)^2 + \left( y + \frac{ 5 }{ 2 } \right)^2 = \frac{ 45 }{ 4 } $.	2
3472	Find the center and radius of the circle $ \left(x - 1 \right)^2 + \left( y + 1 \right)^2 = \sqrt{ 61 } $.	2
3473	Find the center and radius of the circle $ x^2 + y^2 -4 x + 6 y + 14 = 0 $.	2
3474	Find the center and radius of the circle $ x^2 + y^2 + 2 x + 4 y -1 = 0 $.	2
3475	Find the center and radius of the circle $ \left(x - 5 \right)^2 + \left( y - 6 \right)^2 = 36 $.	2
3476	Find the center and radius of the circle $ x^2 + y^2 + 6 x -6 y + 9 = 0 $.	2
3477	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 0 , -6 \right)} $ and radius $ \color{blue}{ 1 }$	2
3478	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -1 , 0 \right)} $ and radius $ \color{blue}{ 2 }$	2
3479	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -2 , 0 \right)} $ and radius $ \color{blue}{ 4 }$	2
3480	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 4 , 6 \right)} $ and radius $ \color{blue}{ 2 }$	2
3481	Find the center and radius of the circle $ x^2 + y^2 -10 x + 10 y + 34 = 0 $.	2
3482	Find the center and radius of the circle $ \left( x + 3 \right)^2 + \left( y - 4 \right)^2 = 49 $.	2
3483	Find the center and radius of the circle $ x^2 + y^2 + 4 x + 3 y -5 = 0 $.	2
3484	Find the center and radius of the circle $ x^2 + y^2 + 18 x -8 y + \frac{ 339 }{ 4 } = 0 $.	2
3485	Find the center and radius of the circle $ x^2 + y^2 -4 y + 3 = 0 $.	2
3486	Find the center and radius of the circle $ x^2 + y^2 + 10 x -6 y + 18 = 0 $.	2
3487	Find the center and radius of the circle $ x^2 + y^2 + 2 x -35 = 0 $.	2
3488	Find the center and radius of the circle $ x^2 + y^2 + 4 x + 12 y + 23 = 0 $.	2
3489	Find the center and radius of the circle $ x^2 + y^2 -8 x + 10 y +1 = 0 $.	2
3490	Find the center and radius of the circle $ \left(x - 4 \right)^2 + \left( y - 2 \right)^2 = 2 $.	2
3491	Find the center and radius of the circle $ x^2 + y^2 + 14 x + 20 y + 105 = 0 $.	2
3492	Find the center and radius of the circle $ x^2 + y^2 -6 x + 4 y + 45 = 0 $.	2
3493	Find the center and radius of the circle $ \left( x + 12 \right)^2 + \left( y + 6 \right)^2 = 225 $.	2
3494	Find the center and radius of the circle $ \left( x + 4 \right)^2 + \left( y + 3 \right)^2 = 23 $.	2
3495	Find the center and radius of the circle $ \left( x + 1 \right)^2 + \left( y + 2 \right)^2 = 9 $.	2
3496	Find the center and radius of the circle $ x^2 + y^2 + 12 x + 12 y -44 = 0 $.	2
3497	Find the center and radius of the circle $ \left( x + 4 \right)^2 + y^2 = \frac{ 289 }{ 4 } $.	2
3498	Find the center and radius of the circle $ \left(x - 1 \right)^2 + \left( y + 3 \right)^2 = 20 $.	2
3499	Find the center and radius of the circle $ \left(x - 3 \right)^2 + \left( y - 4 \right)^2 = 38 $.	2
3500	Find the center and radius of the circle $ \left(x - 5 \right)^2 + \left( y - 4 \right)^2 = 9 $.	2