Four? Isn't it stated in the question? Unless I am assuming wrong.
Answer:
the alternate interior angle of angle 5 is angle 4
the measurement of this angle is 70°
angle 3 is 110°
the alternate interior angle of 3 is angle 6
the measurement of this angle is 110°
The correct answer is {1, 2, 5, 6}.
A intersect B would be {3, 4}; the complement of this is everything else.
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