Angle 1 & Angle 2 are ADJACENT ANGLES as they are both next to each other.
        
             
        
        
        
If the scale is
R.F.= 1/2000000
=1/2x 10000x100
1cm=20000m
The scale of a map is given as= 1/2000000
Two town are 4 cm apart on the map.
the actual distance between two towns
=4x 20000
=80000 m
=80000/1000 Km
=80Km
I hope this help you 
 
        
             
        
        
        
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