m <1= 
A. 40
B. 80
C. 160
                                             
                                          
                                          
                                        
											 
											Answer:
A. 40
Step-by-step explanation:
In such a geometry the measure of the angle is the average of the measures of the intercepted arcs.
∠1 = ∠3 = (50° +30°)/2 = 40°