3•2∠1=2∠2
3∠1=∠2;180-∠1=∠2
3∠1=180°-∠1
4∠1=180÷4=∠1=45°
∠3 и ∠1=45°
∠2=180-45=135°
∠2 и ∠4=135
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3•2∠1=2∠2
3∠1=∠2;180-∠1=∠2
3∠1=180°-∠1
4∠1=180÷4=∠1=45°
∠3 и ∠1=45°
∠2=180-45=135°
∠2 и ∠4=135