Writing the equation of a circle
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Period 4
Which of the choices below matches the standard equation of a circle that I gave in the video?
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Please note that the symbol: ^ denotes an exponent
(x  h)^2 + (y  k)^2 = r^2
(h  x)^2 + (k  y)^2= r^2
y = mx + b
y' = m
In the equation of a circle, what two letters represent the center?
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h
k
x
r
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In the equation of a circle, what letter represents the radius?
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h
k
x
r
What is the equation of a circle that has a center of (3,1) and a radius of 3?
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(x  3)^2 + (y + 1)^2 = 9
(x  3)^2 + (y + 1)^2 = 3
(x + 3)^2 + (y  1)^2 = 9
(x + 3)^2 + (y  1)^2 = 3
What is the RADIUS of a circle that has the equation: (x  7)^2 + (y + 2)^2 = 64
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Select your choice from below.
7
2
8
None of the above
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