Circles in the coordinate plane

1. 1.
   What is the radius of the circle (x + 3)² + (y − 1)² = 64?
2. 2.
   What is the radius of the circle (x − 3)² + (y − 1)² = 64?
3. 3.
   What is the centre of the circle (x − 4)² + (y + 5)² = 64?
4. 4.
   What is the centre of the circle (x + 2)² + (y − 3)² = 49?
5. 5.
   Which is the equation of the circle with centre (4, -2) and radius 6?
   a)(x − 4)² + (y + 2)² = 36b)(x + 4)² + (y − 2)² = 36c)(x − 4)² + (y + 2)² = 49d)(x + 2)² + (y − 4)² = 36
6. 6.
   What is the centre of the circle x² + (y + 5)² = 1?
7. 7.
   What is the radius of the circle (x + 4)² + (y − 5)² = 81?
8. 8.
   What is the centre of the circle x² + (y − 5)² = 49?
9. 9.
   What is the radius of the circle (x + 2)² + (y + 3)² = 4?
10. 10.
    What is the radius of the circle (x + 3)² + (y + 3)² = 36?
11. 11.
    What is the radius of the circle (x − 5)² + (y − 4)² = 16?
12. 12.
    What is the centre of the circle (x + 6)² + (y − 4)² = 4?
13. 13.
    Which is the equation of the circle with centre (3, -3) and radius 5?
    a)(x − 3)² − (y + 3)² = 25b)(x − 3)² + (y + 3)² = 5c)(x + 3)² + (y − 3)² = 25d)(x − 3)² + (y + 3)² = 25
14. 14.
    Which is the equation of the circle with centre (-5, -3) and radius 2?
    a)(x + 5)² + (y + 3)² = 2b)(x + 5)² + (y + 3)² = 9c)(x − 5)² + (y − 3)² = 4d)(x + 5)² + (y + 3)² = 4
15. 15.
    What is the radius of the circle (x − 4)² + (y + 4)² = 64?
16. 16.
    What is the radius of the circle (x − 4)² + (y − 1)² = 64?
17. 17.
    Which is the equation of the circle with centre (-3, -3) and radius 7?
    a)(x + 3)² − (y + 3)² = 49b)(x + 3)² + (y + 3)² = 49c)(x + 3)² + (y + 3)² = 7d)(x + 3)² + (y + 3)² = 64
18. 18.
    What is the centre of the circle (x + 1)² + y² = 16?
19. 19.
    Which is the equation of the circle with centre (2, -2) and radius 7?
    a)(x − 2)² + (y + 2)² = 64b)(x − 2)² + (y + 2)² = 49c)(x + 2)² + (y − 2)² = 49d)(x − 2)² + (y + 2)² = 7
20. 20.
    What is the radius of the circle (x + 4)² + (y − 4)² = 9?

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