Page 652 - Basic College Mathematics with Early Integers

S E C T ION 9 .1 I LINES AND ANGLES 629

Objective Find the measure of ∠x in each figure. See Example 6.

33. 34. 35. 36.
150
x
x
x 42 x
48 36
74 90
47 12

Find the measures of angles x, y, and z in each figure. See Examples 7 and 8.

37. 38. 39. 40.
x y
x 150 y x
z x
y 165 z y 103 z 44
z

41. m 7 n 42. m 7 n 43. m 7 n 44. m 7 n

x 46 z
m y m
x
m m
x 80 110
z y
n n
y y n x 39
z n z

Objectives Mixed Practice Find two other ways of naming each angle. See Example 2.

C
A
15
D
x 50
y 45
z
B E

45. ∠x 46. ∠y

47. ∠z 48. ∠ABE (just name one other way)

Find the measure of each angle in the figure above. See Example 6.

49. ∠ABC 50. ∠EBD 51. ∠CBD 52. ∠CBA

53. ∠DBA 54. ∠EBC 55. ∠CBE 56. ∠ABE