1)
180-160=20
х=20°
2)
х=30°
3)
180°-140°=40°
х=40°
4)
х=60°
5)
180°-(75°+30°)=75°
х=75°
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Answers & Comments
1)
180-160=20
х=20°
2)
х=30°
3)
180°-140°=40°
х=40°
4)
х=60°
5)
180°-(75°+30°)=75°
х=75°