Ответ:
кут ACD = 31°
Объяснение:
1) 31 +29 = 60° - < BAC и < BCA
2) 180 - 60 = 120° - <B
< B = < D
3) 120 + 29 = 149° - < D и < BCA
4) 180 - 149 = 31° - < ACD
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Ответ:
кут ACD = 31°
Объяснение:
1) 31 +29 = 60° - < BAC и < BCA
2) 180 - 60 = 120° - <B
< B = < D
3) 120 + 29 = 149° - < D и < BCA
4) 180 - 149 = 31° - < ACD