Question

80 points please help

Answer 1

`\Large \boxed{\sf \angle 6 + \angle 8}`

Explanation:

Supplementary angles add up to 180°

Angles on a straight line add up to 180°

`\angle 1 + \angle 2=180\°`

`\angle 4 + \angle 8=180\°`

Interior angles add up to 180°

`\angle 7 + \angle 6=180\°`

`\angle 6+ \angle 8\\eq 180\°`