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
2051	Find the center and radius of the circle $ (x+5)^2+(y+4)^2=4 $.	2
2052	Find the center and radius of the circle $ (x+5)^2+(y-2)^2=1 $.	2
2053	Find the center and radius of the circle $ x^2+y^2 -2 x -8 y + 1 = 0 $.	2
2054	Find the center and radius of the circle $ x^2+y^2=0 $.	2
2055	Find the center and radius of the circle $ x^2+y^2 + 4 x + 8 y + 11 = 0 $.	2
2056	Find the center and radius of the circle $ x^2+y^2 -6 x -4 y + 9 = 0 $.	2
2057	Find the center and radius of the circle $ x^2+y^2 -2 x + 24 y + 120 = 0 $.	2
2058	Find the center and radius of the circle $ x^2+y^2 + 6 x -8 y -24 = 0 $.	2
2059	Find the center and radius of the circle $ x^2+y^2 -28 x -10 y + 220 = 0 $.	2
2060	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 0 , 0 \right)} $ and radius $ \color{blue}{ \frac{ 85 }{ 2 } }$	2
2061	Find the center and radius of the circle $ \left( x + 6 \right)^2 + y^2 = 49 $.	2
2062	Find the center and radius of the circle $ \left( x + 25 \right)^2 + y^2 = 49 $.	2
2063	Find the center and radius of the circle $ \left( x + 3 \right)^2 + y^2 = 9 $.	2
2064	Find the center and radius of the circle $ x^2 + y^2 -4 x -22 y + 109 = 0 $.	2
2065	Find the center and radius of the circle $ x^2 + y^2 + 4 x + 22 y + 109 = 0 $.	2
2066	Find the center and radius of the circle $ \left( x + 6 \right)^2 + \left( y - 2 \right)^2 = \frac{ 9 }{ 4 } $.	2
2067	Find the center and radius of the circle $ \left( x + \frac{ 11 }{ 2 } \right)^2 + \left( y - \frac{ 1 }{ 2 } \right)^2 = 6 $.	2
2068	Find the center and radius of the circle $ x^2 + y^2 -16 x + 2 y + 56 = 0 $.	2
2069	Find the center and radius of the circle $ x^2 + y^2 -4 x + 8 y + 5 = 0 $.	2
2070		2
2071	Find the center and radius of the circle $ x^2 + y^2 -2 y -99 = 0 $.	2
2072	Find the center and radius of the circle $ x^2 + y^2 + 2 x -2 y -3 = 0 $.	2
2073	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 5 , -1 \right)} $ and radius $ \color{blue}{ 3 }$	2
2074	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 1 , 2 \right)} $ passing throught the point $ \color{blue}{ P = \left( 3 , -4 \right) } $.	2
2075	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -9 , -1 \right)} $ passing throught the point $ \color{blue}{ P = \left( 2 , 8 \right) } $.	2
2076	Find the center and radius of the circle $ x^2 + \left( y + 10 \right)^2 = 49 $.	2
2077	Find the center and radius of the circle $ \left(x - 2 \right)^2 + y^2 = 9 $.	2
2078	Find the center and radius of the circle $ x^2 + \left( y - 4 \right)^2 = 16 $.	2
2079	Find the center and radius of the circle $ \left(x - 2 \right)^2 + \left( y - 8 \right)^2 = 16 $.	2
2080	Find the center and radius of the circle $ \left(x - 2 \right)^2 + \left( y - 8 \right)^2 = 64 $.	2
2081	Find general equation of a circle with a center at $ \color{blue}{C = \left( -1 , -8 \right)} $ and radius $ \color{blue}{ 9 }$	2
2082	Find general equation of a circle with a center at $ \color{blue}{C = \left( -1 , -4 \right)} $ and radius $ \color{blue}{ 9 }$	2
2083	Find the center and radius of the circle $ \left( x + 15 \right)^2 + \left( y + 5 \right)^2 = 81 $.	2
2084	Find the center and radius of the circle $ x^2 + y^2 + 8 x + 10 y + 81 = 0 $.	2
2085	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -5 , -6 \right)} $ and radius $ \color{blue}{ 5 }$	2
2086	Find the center and radius of the circle $ x^2 + y^2 + 4 x + 6 y + 4 = 0 $.	2
2087	Find the center and radius of the circle $ \left(x - 3 \right)^2 + \left( y - 4 \right)^2 = 100 $.	2
2088	Find the center and radius of the circle $ \left( x + \frac{ 5 }{ 2 } \right)^2 + \left( y - \frac{ 9 }{ 2 } \right)^2 = 59 $.	2
2089	Find the center and radius of the circle $ x^2 + y^2 -6 x -8 y -75 = 0 $.	2
2090	Find the center and radius of the circle $ x^2 + y^2 + 12 x + 18 y -36 = 0 $.	2
2091	Find the center and radius of the circle $ \left(x - 6 \right)^2 + \left( y - 6 \right)^2 = 196 $.	2
2092	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -1 , 2 \right)} $ and radius $ \color{blue}{ 10 }$	2
2093	Find the center and radius of the circle $ \left(x - 3 \right)^2 + \left( y - 10 \right)^2 = 169 $.	2
2094	Find the center and radius of the circle $ \left(x - 7 \right)^2 + \left( y - 2 \right)^2 = 81 $.	2
2095	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -5 , -5 \right)} $ passing throught the point $ \color{blue}{ P = \left( -8 , -2 \right) } $.	2
2096	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 2 , 8 \right)} $ and radius $ \color{blue}{ 3 }$	2
2097	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 5 , -13 \right)} $ and radius $ \color{blue}{ 11 }$	2
2098	Find standard equation of a circle with a center at $ \color{blue}{C = \left( -9 , -7 \right)} $ and radius $ \color{blue}{ 17 }$	2
2099	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 0 , -16 \right)} $ and radius $ \color{blue}{ \sqrt{ 15 } }$	2
2100	Find standard equation of a circle with a center at $ \color{blue}{C = \left( 12 , -1 \right)} $ and radius $ \color{blue}{ \sqrt{ 209 } }$	2