Ответ:
угол ABD = 72° => DBC = 72°
72 + 72 = 144 ° ( ABC ; ADC )
360 - 144 × 2 = 72°
ответ 1
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Ответ:
угол ABD = 72° => DBC = 72°
72 + 72 = 144 ° ( ABC ; ADC )
360 - 144 × 2 = 72°
ответ 1