Name ______________________Date ____________Score ____ / 12
Equation of a circle practice
Equation of a circle · 1–12
Write the equation, or find the center and radius.
1.Write the equation of the circle with center (4, −7) and radius 10.
2.Write the equation of the circle with center (7, 1) and radius 10.
3.Write the equation of the circle with center (2, 3) and radius 10.
4.Write the equation of the circle with center (−3, −1) and radius 8.
5.Write the equation of the circle with center (−6, 8) and radius 2.
6.Write the equation of the circle with center (0, 7) and radius 7.
7.Write the equation of the circle with center (−6, 5) and radius 10.
8.Write the equation of the circle with center (−9, −3) and radius 10.
9.Write the equation of the circle with center (6, 4) and radius 9.
10.Write the equation of the circle with center (−3, −4) and radius 4.
11.Write the equation of the circle with center (6, 3) and radius 6.
12.Write the equation of the circle with center (−5, −7) and radius 10.
Answer key — Equation of a circle practice
Equation of a circle
1.(x − 4)2 + (y + 7)2 = 100
2.(x − 7)2 + (y − 1)2 = 100
3.(x − 2)2 + (y − 3)2 = 100
4.(x + 3)2 + (y + 1)2 = 64
5.(x + 6)2 + (y − 8)2 = 4
7.(x + 6)2 + (y − 5)2 = 100
8.(x + 9)2 + (y + 3)2 = 100
9.(x − 6)2 + (y − 4)2 = 81
10.(x + 3)2 + (y + 4)2 = 16
11.(x − 6)2 + (y − 3)2 = 36
12.(x + 5)2 + (y + 7)2 = 100
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