Question

please help me argent

Answer 1

option (c) 73
hope it helps you

Answer 2

In triangle AGB,
          AGB + GBA + BAG = 180 degree (angle sum property)
           AGB = 180 - (50+65)
                   AGB = 65
                AGB = b = 65 (vertically opposite angles)
In triangle FCE,
               FCE + CEF + EFC = 180
               EFC = 180 - {(360-334) + 112]
               EFC = 42
             EFC + a = 180 (linear pair)   
                    a = 180 - 42
                    a = 138
Therefore a - b = 138 - 65
                a - b = 74
Hope this helps you :)