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Conic Sections: Circles

Conic Sections: Circles

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What is the radius of the circle?
4
16
4
1

What is the equation in standard form of a circle with radius 5, centered at (1,2)?
(x-1)²+(y-2)² = 25
(x+1)²+(y+2)² = 5
(x-1)²+(y-2)² = 25
(x+2)²+(y+1)² = 5
(x-2)²+(y-1)² = 25

What is the radius and center of the circle?
Radius is 3, and the center is at point (3,-1)
Radius is 3, and the center is at point (3,-1)
Radius is 9, and the center is at point (-3,1)
Radius is 3, and the center is at point (-3,1)

What is the center of the circle?
(4,0)
(-4,9)
(4,0)
(0,4)

(0,3)
(3,0)
(0,-3)
(0,3)

What is the radius of the circle?
3
-9
-3
3
5

What is the center of the circle?
(0,5)
(5,9)
(-5,0)
(0,-5)
(0,5)