Name________________________

EXTERIOR ANGLES OF A TRIANGLE  #2

Directions:  Find the measurement of each missing angle in the triangles below.  Remember, the Exterior Angles Theorem states that the exterior angle is congruent to the sum of the two non-adjacent angles.  For example, in Problem 1, the exterior angle (x) is congruent to the sum of the two angles furthest away (60̊ & 70̊).  Be careful, sometimes you’ll need to find the measure of an interior angle.			  

125̊

55̊

55̊

60̊

1)              	         	                2)                                              3)                                          4)  

70̊

60̊

28̊

50̊

x

x

x

30̊

112̊

x

40̊

   x =                            	                   x =                     		   x =                      	           x = ________          

130̊

25̊

x

50̊

x

62̊

127̊

37̊

5)                                           6)                                             7)                                           8)  

56̊

x

136̊

87̊

74̊

28̊

x

58̊

72̊

   x =                            	                   x =                     		   x =                      	           x = ________          

x

x

55̊

49̊

x

73̊

65̊

9)              	         	               10)                                              11)                                          12)  

25̊

 

125̊

x

67.5̊

41̊

60̊

150̊

39.5̊

30̊

   x =                            	                   x =                     		   x =                      	           x = ________          

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