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120+25 + x = 180
x = 35
180-44 = 136
136÷2 = 68
sudut CBE
= 180 - 60
= 120
sudut AEC
= 180 - ( 25 + 120 )
= 180 - 145
= 35
nomer 29
sudut COD
= 180 - 44
= 136
sudut ABD
= 136 / 2
= 68