11.2.4 Circles in the Coordinate Plane - Practice
1. Write the equation of the circle J with center K ( − 7, 3) and radius 6.
2. Write the equation of the circle B that passes through (4, − 6) and has center (3, − 2).
3. Graph the equation. ( x − 3) 2 + y 2 = 9
4. Graph the equation. ( x + 3) 2 + ( y + 1) 2 = 9
6. A merry-go-round is to be built in a park. The center of the structure is required to be equidistant from three support columns located at Q (4, − 2), R (2, − 4), and S (0, 2). What are the coordinates for the location of the center of the merry-go-round?
5. A circular platform is to be built in a playground. The center of the structure is required to be equidistant from three support columns located at D ( − 2, − 4), E (1, 5), and F (2, 0). What are the coordinates for the location of the center of the platform?
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