Answer:
1.112° 2.68° 3.90° 4.90° 5.22° 6.158°
Step-by-step explanation:
1. sum of angles in a straight line add up to 180°. To get ∠1, take 180°-68°=112°
2. corresponding angles,where ∠2 corresponds to angle 68°
3.sum of angles on a straight line add up to 180°. To get ∠4 take 180°-90°=90°
4. corresponding angles , where ∠4 corresponds to angle 90°
5. sum of angles in a triangle add up to 180°, where to get ∠5 ,take 180°-(90+68) = 22°
6. sum of angles on a straight line add up to 180°,hence to get ∠6 ,take 180°-22°=158°
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