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  1. Vocabulary Arcs Segments Equations of Circles Angles 1pt 1 pt 1 pt 1pt 1 pt 2 pt 2 pt 2pt 2pt 2 pt 3 pt 3 pt 3 pt 3 pt 3 pt 4 pt 4 pt 4pt 4 pt 4pt 5pt 5 pt 5 pt 5 pt 5 pt

  2. A line that intersects a circle at exactly one point.

  3. What is a tangent?

  4. An arc that measures less than 180 degrees.

  5. What is a minor arc?

  6. An angle with a vertex on the circle and legs in the interior of the circle.

  7. What is an inscribed angle?

  8. A point where a circle meets a tangent.

  9. What is a point of tangency?

  10. A segment that has its endpoints on the circle.

  11. What is a chord?

  12. A C If chord AC = chord CD, then what can we assume about their arcs? B D

  13. arc AB = arc CD

  14. B C Find the measure of arc AD. 7xo (5x+18)o A D

  15. 94.5o

  16. 130o Find x. xo

  17. X = 100o

  18. A (4x + 50)o 30o 3xo C B Find the measure of arc AB

  19. 90o

  20. If the radius of the circle is 9, what is the arc length of AB? A B 700 C

  21. 17.3

  22. 5 x Find x. 4 2

  23. X = 10

  24. 5x+27 Find x. Assume that segments that appear to be tangent are tangent. 14x

  25. 3

  26. Find x. 16 x 12 Assume that segments that appear to be tangent are tangent.

  27. 13.9

  28. 5 x 3 9 Find x.

  29. 4

  30. Find x. X+16 16 x

  31. 8

  32. In an equation of a circle, the (h, k) values represent the __________________ and the sum represents the ____________________.

  33. Center coordinates, radius squared

  34. A circle with the equation (x-8)2 + (y+13)2 = 196 would have a center at ______ and a radius of ______.

  35. (8, -13) r = 14

  36. Write the equation of a circle with a center at (-3,6) and a radius endpoint at (0,6)

  37. (x+3)2 + (y-6)2 = 9

  38. Graph the circle with the equation: x2 + (y-2)2 = 25

  39. Write an equation for a circle whose diameter has endpoints (-2, 2) and (2, 2)

  40. X2 + (y-2)2 = 4

  41. Find the measure of x if the measure of arc ACB is 225. A B xo C

  42. 135o

  43. 75o Find m<x. xo

  44. 37.5o

  45. Find x. Assume segments that appear to be tangents are tangent. xo

  46. 90o

  47. AB is a diameter. Find the m<ACB and m<ADB. A D B C

  48. 90o, 90o

  49. Find the m<AED. B A E 94o 74o D C 92o