11.2 Review Worksheet (continued)
Graph each equation. 41. x 2 + ( y − 2) 2 = 9
42. ( x + 1) 2 − y 2 = 16
43. x 2 + y 2 = 100
44. x 2 + ( y + 2) 2 = 4
45. Hundreds of stone circles can be found along the Gambia River in western Africa. The stones are believed to be over 1000 years old. In one of the circles at Ker Batch, three stones have approximate coordinates of A (3, 1), B (4, − 2), and C ( − 6, − 2). a. What are the coordinates of the center of the stone circle?
b. Each unit of the coordinate plane represents 1 ft. What is the diameter of the stone circle?
282
Made with FlippingBook - PDF hosting