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- 1. Multiple Choice
What is the standard equation of a circle?
(x-k)2 + (y-h)2 = r2
(x+h)2 + (y+k)2 = r2
(x-h)2 + (y-k)2 = r2
(k-x)2 + (h-y)2 = r2
- 2. Multiple Choice
What does (h,k) standard for in the standard circle equation?
(h,k) is the center of the circle
(h,k) is a point on the circle.
(h,k) is a point that we guess and find
(h,k) is the radius of the circle
- 3. Multiple Choice
What does the r in the standard equation stand for?
r is the diameter of the circle
r is the radius of the circle
r is the x coordinate of the center of the circle
r is the y coordinate of the center of the circle
- 4. Multiple Choice
Write the equation of a circle with center (7, 0) with radius 3.
(x - 7)2 + y2 = 9
(x + 7)2 + y2 = 3
(x - 7)2 + y2 = 3
(x + 7)2+ y2 = 9
- 5. Multiple Choice
What is the center and radius of a circle with an equation (x+5)2 + (y-1)2 = 64
Center is (5,-1) and radius is 8
Center is (-5, 1) and radius is 8
Center is (-1, 5) and radius is 8
Center is (-5,1) and radius is 64
- 6. Multiple ChoiceWhat are the coordinates of the center and the radius of the circle with equation:
(x - 4)2 + (y - 3)2 = 25 ?Center (4,3)
Radius = 5 unitsCenter (4,3)
Radius = 25 unitsCenter (-4,-3)
Radius = 25 unitsCenter (-4,-3)
Radius = 5 units - 7. Multiple Choice
What is the equation of a circle with radius 4 and center (0, 8)?
x2 + (y-8)2 = 16
x2 + (y-8)2= 4
x2 + (y-8)2 = 4
x2 + (y+8)2 = 16
- 8. Multiple Choice
The diameter of a circle has length 12. The center is at (-5, 2). What is the equation of the circle?
(x - 2)2 + (y + 5)2 = 36
(x - 5)2 + (y + 2)2 = 6
(x + 5)2 + (y - 2)2 = 36
(x + 2)2 + (y - 5)2 = 6
- 9. Multiple Choice
What is the equation for this circle?
(x+1)+(y+1)=9
x²+y²=9
x2+y2=3
- 10. Multiple ChoiceWhich graph corresponds to
(x)2+ (y-6)2=9ABCD - 11. Multiple Choice
Which graph corresponds to
(x-4)2+ (y+4)2=25
A
B
C
D
- 12. Multiple Choice
Which equation matches the circle on the graph?
(x-2)2+(y+3)2=81
(x+3)2+(y-2)2=9
(x-2)2+(y+3)2=9
(x-2)2+(y-3)2=3
- 13. Multiple Choice
Which equation matches the circle on the graph?
(x+1)2+(y+3)2=4
(x-3)2+(y-1)2=4
(x+3)2+(y+1)2=4
(x+3)2+(y+1)2=2
- 14. Multiple Choice
Which equation matches the circle on the graph?
(x-3)2+(y-4)2=16
(x-5)2+(y-2)2=20
(x+3)2+(y+4)2=16
(x-3)2+(y-4)2=4
- 15. Multiple Choice
Which equation matches the circle on the graph?
(x+2)2+y2=16
(x+2)2+y2=4
(x+4)2+y2=4
(x+20)2+y2=12
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