1. Chapter 11

2. If 2 sides of a triangle are radii then the triangle is ______________

3. isosceles.

4. Coplanar circles with the same center are _________ circles

5. concentric.

6. A ________ arc is less than 180 0

7. minor

8. A diameter that is ______to a chord bisects that chord

9. perpendicular.

10. Create a right triangle:.

11. .

12. A line that is tangent to each of 2 coplanar circles is a __________

13. common tangent

14. How many common tangents do the following circles have? a. b. c. d.

15. a.b. c. d. four three two one

16. A radius is ________ to a tangent at the point of tangency

17. perpendicular.

18. Tangent segments from a point outside a circle are _________

19. congruent P A B PA = PB

20. The sides of an INSCRIBED POLYGON are _________ of a circle

21. chords

22. The vertex of a CENTRAL ANGLE is on the ______ and the sides contain _______

23. center… radii.

24. m 1 = ____. 1 x 0

25. m 1 = x. 80 o 80 o o

26. The vertex of an INSCRIBED ANGLE is on the ______ and the sides contain ________

27. circle… chords.

28. m 1 = ______. 1 x o

29. m 1 = x. 40 80 o o __ 1 2 o

30. m 1 = _______ 1 x o

31. m 1 = x 100 200 o 1 __ 2 o o

32. m 1 = _______ 1 x y o o

33. m 1 = (x + y) 60 40 80 o o 1 ___ 2 o

34. m 1 = _____ xoxo yoyo 1

35. m 1 = (x - y) o 100 0 20 o 40 o 1212

36. An angle inscribed in a semicircle is a _______ angle

37. right.

38. The opposite angles of an INSCRIBED QUADRILATERAL are _________________

39. supplements 1 2 3 4 m 1 + m 3 = 180 m 2 + m 4 = 180

40. Complete: ( ___ )( ___ ) = ( ___ ) ( ___ ) a bc d

41. ( a )( b ) = ( c )( d ) 3 6 4x 3x = (4)(6) 3x = 24 x = 8

42. Complete: ( ___ )( ___ ) = ( ___ )( ___ ) a b c d

43. (a)(a + b) = (c)(c + d) 5 7 6 x 5 (12) = 6 (6 + x) 60 = 36 + 6x 24 = 6x 4 = x

44. Complete: ( ___ )( ___ ) = ( ___ ) 2 a b c

45. (a)(a + b) = (c) 2 3 9 x 3(3 + 9) = x 2 36 = x 2 6 = x

46. State the center and the radius of the following circle: (x – 4) 2 + (y + 8) 2 = 49

47. (x – 4) 2 + (y + 8) 2 = 7 2 Center (4, -8) Radius = 7

48. Write the equation of a circle with center (-1, 3) and passing through (-4, -6)

49. (x + 1) 2 + (y – 3) 2 = 90

50. Given: 3x 2 - 4x + 6 a = _____ b = _____ c = _____

51. a = 3 b = -4 c = 6

52. COMPLETE THE QUADRATIC FORMULA: -b + 2( ) -_______________ x =

53. -b + 2( ) -_______________ x = b 2 - 4ac a