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Team 2
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Teams
Name
Score
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15
×
A circle has the equation x2 + y2=16. What is the radius of the circle?
256
4
32
16
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15
×
What is the equation of a circle with center (2, 4) and radius 5?
(x-2)<sup>2</sup>+(y-4)<sup>2</sup> = 25
(x+2)<sup>2</sup>+(y+4)<sup>2</sup> = 25
(x-2)<sup>2</sup>+(y-4)<sup>2</sup> = 5
(x+2)<sup>2</sup>+(y+4)<sup>2</sup> = 5
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×
banana
Go to last place!
Oops!
×
rocket
Go to first place!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
lifesaver
Give 5 points!
Oops!
15
×
What is the circumference of a circle whose equation is whose equation is 2x2 + 2y2= 8? :-D
50.24 units
100.48 units
12.56 units
25.12 units
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×
trap
No points!
Oops!
×
magnet
Take 20 points!
Okay!
×
rocket
Go to first place!
Okay!
×
baam
Lose 25 points!
Oops!
×
trap
No points!
Oops!
×
fairy
Take points!
5
10
15
20
25
×
fairy
Take points!
5
10
15
20
25
×
baam
Lose 10 points!
Oops!
15
×
A circle has the equation (x+5)2 + (y-2)2 = 9. What is the center of the circle?
(5, -2)
(-5, 2)
(-2, 5)
(2, -5)
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15
×
Which is the equation of a circle centered at origin and that passes through the point (-8,0)
<i>x</i><sup>2</sup> + <i>y</i><sup>2</sup>= 34
(<i>x </i>- 3)<sup>2</sup> + (<i>y </i>- 5)<sup>2</sup>= 34
<i>x</i><sup>2</sup> + <i>y</i><sup>2</sup>= 64
(<i>x </i>- 3)<sup>2</sup> + (<i>y </i>- 5)<sup>2</sup>= 64
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15
×
Select the equation of a circle whose center is at (-5, 0), and its diameteris 18.
(<i>x </i>- 5)<sup>2</sup>+ <i>y</i><sup>2</sup>= 9
(<i>x </i>- 5)<sup>2</sup>+ <i>y</i><sup>2 </sup>= 81
(<i>x </i>+ 5)<sup>2</sup>+ <i>y</i><sup>2</sup>= 9
(<i>x </i>+ 5)<sup>2</sup>+ <i>y</i><sup>2 </sup>= 81
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15
×
C is the center of the circle shown below. What is the equation of circle C?
(<i>x </i>- 1)<sup>2</sup> + (<i>y </i>- 3)<sup>2</sup>= 25
(<i>x </i>+ 1)<sup>2</sup> + (<i>y </i>+ 3)<sup>2</sup>= 100
(<i>x </i>- 1)<sup>2</sup> + (<i>y </i>- 3)<sup>2</sup>= 100
(<i>x </i>+ 1)<sup>2</sup> + (<i>y </i>+ 3)<sup>2</sup>= 25
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15
×
The center of a circle is at (6, -7) and the diameter of the circle is 22. Choose its equation.
(<i>x </i>- 6)<sup>2</sup> + (<i>y </i>+ 7)<sup>2</sup>= 121
(<i>x </i>+ 6)<sup>2 </sup>+ (<i>y </i>- 7)<sub>2</sub>= 11
(<i>x </i>+ 6)<sup>2</sup> + (<i>y </i>- 7)<sup>2</sup>= 121
(<i>x </i>- 6)<sup>2</sup>+ (<i>y </i>+ 7)<sup>2</sup>= 11
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15
×
Which point lies on the circle whose equation is (x - 3)2+ (y + 3)2= 45
(1, 3)
(3,3)
(0, 3)
(2,3)
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15
×
A circle has the equation (x-3)2 + (y + 5)2 = 36. Which of the following statements is false?
The x-coordinate of the center is 3.
The radius of the circle is 6.
The point (3, 1) lies on the circle.
The y-coordinate of the center is 5.
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15
×
C is the center of the circle shown below. What is the equation of circle C?
(<i>x </i>- 2)<sup>2</sup> + (<i>y </i>+ 1)<sup>2</sup>= 3
(<i>x </i>+ 2)<sup>2</sup> + (<i>y </i>- 1)<sup>2</sup>= 9
(<i>x </i>+ 2)<sup>2</sup> + (<i>y </i>- 1)<sup>2</sup>= 3
(<i>x </i>- 2)<sup>2</sup> + (<i>y </i>+ 1)<sup>2</sup>= 9
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×
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