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Name Date 10.7 Practice A In Exercises 1-4, write the standard equation of the circle, 3. a circle with center (0, 0) and radius $ 4. a circle with center (0, -5) and radius 2 In Exercises 6 and 6, use the given information to write the standard equation of the circle. 6. The center is (0, 0), and a point on the circle is (3, -4). 6. The center is (3, -2), and a point on the circle is (23, 19). In Exercises 7-9, match each graph with its equation. 7. A. 8+y =4 B. (x - 3) + 1 = 4 C. (x + 3) + 12 = 4 10. The equation of a circle is x? + y - 6y + 9 = 4. Find the center and radius of the circle. Then graph the circle, 11. Prove or disprove that the point (-3, 3) lies on the circle centered at the origin with radius 4. 12. You are using a math software program to design a pattern for an Olympic flag. In addition to the dimensions shown in the diagram, the distance between the outer edges any two adjacent rings in the same row is 3 inches. 15 in. 26 in. a. Use the given dimensions to write equations representing the O outer circles of the five rings. Use inches as units in a coordinate T. plane with the lower left corner of the flag on the origin. 18 in. 31 in. b. Each ring is 3 inches thick. Explain how you can adjust the equations of the outer circles to write equations representing the inner circles. 98 Integrated Mathematics II Copyright @ Big Ideas Learning, LLC Resources by Chapter All rights reserved