Equation of a Circle Answers
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On a coordinate plane, a circle has a center at (1, negative 2) and a radius of 4 units.
A
(x – 1)2 + (y + 1)2 = 16B
(x – 1)2 + (y + 1)2 = 4C
(x + 1)2 + (y –1)2 = 4D
(x + 1)2 + (y – 1)2 = 162
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Which equation represents a circle that contains the point (–5, –3) and has a center at (–2, 1)? Distance formula:
A
(x – 1)2 + (y + 2)2 = 25B
(x + 2)2 + (y – 1)2 = 5C
(x + 2)2 + (y – 1)2 = 25D
(x – 1)2 + (y + 2)2 = 53
Which equation represents a circle that contains the point (–2, 8) and has a center at (4, 0)?Distance formula:
A
(x – 4)2 + y2 = 100B
(x – 4)2 + y2 = 10C
x2 + (y – 4)² = 10D
x2 + (y – 4)² = 1004
Which point is on the circle centered at the origin with a radius of 5 units?Distance formula:
A
(2, )
B
(2, )
C
(2, 1)D
(2, 3)5
What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?
A
2 unitsB
3 unitsC
4 unitsD
5 units6
What is the center of a circle represented by the equation (x+9)2+(y−6)2=102?
A
(−9,6)B
(−6,9)C
(6,−9)D
(9,−6)7
Which equation represents a circle with a center at (–3, –5) and a radius of 6 units?
A
(x – 3)2 + (y – 5)2 = 6B
(x – 3)2 + (y – 5)2 = 36C
(x + 3)2 + (y + 5)2 = 6D
(x + 3)2 + (y + 5)2 = 36Did you find these answers helpful?
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