Ответ:
1. а1б1 = 120° ; аб1 = 60°
2. 2 = 145° ; 4 = 145°
3. mn = 120°
4. 3 = 120° ; 4 = 60°
8. АОЕ = 135°
остальное хз.
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Ответ:
1. а1б1 = 120° ; аб1 = 60°
2. 2 = 145° ; 4 = 145°
3. mn = 120°
4. 3 = 120° ; 4 = 60°
8. АОЕ = 135°
остальное хз.