ECA = 37° => EAC = 37° (AEC Равноюедренный)
DAE = 37° => DEA = 37° (ADC Равнобедренный)
ADE = 180 - 37 - 37 = 106°
BDE = 180 - 106 = 74°
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ECA = 37° => EAC = 37° (AEC Равноюедренный)
DAE = 37° => DEA = 37° (ADC Равнобедренный)
ADE = 180 - 37 - 37 = 106°
BDE = 180 - 106 = 74°