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Equation of a circle practice
Equation of a circle · 1–12
Write the equation, or find the center and radius.
1.(x + 6)2 + (y − 4)2 = 9
2.(x + 2)2 + (y − 3)2 = 64
3.(x − 7)2 + (y + 2)2 = 16
4.(x + 8)2 + (y − 9)2 = 64
5.(x − 1)2 + (y + 5)2 = 1
6.(x + 1)2 + (y + 7)2 = 4
7.(x − 8)2 + (y + 6)2 = 49
8.(x + 8)2 + (y + 2)2 = 1
9.(x + 7)2 + (y + 8)2 = 25
10.(x − 7)2 + (y − 1)2 = 49
11.(x − 9)2 + (y + 7)2 = 25
12.(x − 2)2 + (y + 8)2 = 9
Answer key — Equation of a circle practice
Equation of a circle
1.center (−6, 4), radius 3
2.center (−2, 3), radius 8
3.center (7, −2), radius 4
4.center (−8, 9), radius 8
5.center (1, −5), radius 1
6.center (−1, −7), radius 2
7.center (8, −6), radius 7
8.center (−8, −2), radius 1
9.center (−7, −8), radius 5
10.center (7, 1), radius 7
11.center (9, −7), radius 5
12.center (2, −8), radius 3
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