+0  
 
0
30
1
avatar+763 

Thanks for le helpfulness

 Jul 28, 2020
 #1
avatar+26006 
0

Inside the triangle angle D and C are equal    28 + 2x = 180   x = 76o

 

The two angle at D  sum to a straight line     76 + x = 180    x = 104o

   angle D = angle A = 104o

 Jul 28, 2020

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