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.x2 + y2 + 6x + 4y − 23 = 0
2.x2 + y2 − 6x − 10y + 18 = 0
3.x2 + y2 − 8x + 8y + 7 = 0
4.x2 + y2 + 6x + 10y − 30 = 0
5.x2 + y2 + 14x − 10y + 65 = 0
6.x2 + y2 − 18x + 12y + 101 = 0
7.x2 + y2 + 4x − 2y − 20 = 0
8.x2 + y2 + 2x + 2y − 62 = 0
10.x2 + y2 + 14x − 16y + 32 = 0
11.x2 + y2 − 18x − 12y + 68 = 0
12.x2 + y2 + 12x + 12y + 56 = 0
Answer key — Equation of a circle practice
Equation of a circle
1.center (−3, −2), radius 6
2.center (3, 5), radius 4
3.center (4, −4), radius 5
4.center (−3, −5), radius 8
5.center (−7, 5), radius 3
6.center (9, −6), radius 4
7.center (−2, 1), radius 5
8.center (−1, −1), radius 8
9.center (3, 0), radius 10
10.center (−7, 8), radius 9
11.center (9, 6), radius 7
12.center (−6, −6), radius 4
mathsheetstudio.commathsheetstudio.commathsheetstudio.commathsheetstudio.commathsheetstudio.commathsheetstudio.commathsheetstudio.commathsheetstudio.com