Find the missing angle measurement.
 A. 41°
 B. 49°
 C. 139°
 D. 149°
                                             
                                          
                                          
                                        
											 
											Answer:
C: 139
Step-by-step explanation:
180 - 29 - 12 = 139.
Every triangle has a total of 180 degrees, therefore, subtract the degrees you do have, and find the missing one. Quadrilaterals have a total of 360 degrees and pentagons have 540 degrees.