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20 questions
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
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 distance of the circle
What does the r in the standard equation stand for?
r is the distance 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
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+3)2+(y-2)2=3
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-9)2+(y-16)2=32
Which points lie on the circle represented by the equation (x+2)2 + (y+2)2 = 52
(-2, -2)
(6,4)
(8,8)
(-6, -5)
(-2, -7)
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