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It is straight line so sum of angels will be 180°
(x+30)+(x+20)+(x+10)=180
3x+60=180
3x=120
x=40°
angles will be–(x+30)°=70°
–(x+20)°=60°
–›(x+10)°=50°
(x+30)+(x+20)+(x+10)=180
3x+60=180
3x=120
x=40°
angles will be–(x+30)°=70°
–(x+20)°=60°
–›(x+10)°=50°
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