1)180°-115°=65°-у
180°-110°=70°-z
180°-(65°+70°)=45°-x
2)180°-100°=80°
3x+x+80=180
4x+80=180
4x=180-80
4x=100
x=96
1)180°-115°=65°-у
180°-110°=70°-z
180°-(65°+70°)=45°-x
2)180°-100°=80°
3x+x+80=180
4x+80=180
4x=180-80
4x=100
x=96