Answer:
m∠1 = 50°, m∠2 = 90°, m∠3 = 40°, and m∠4 = 50°
Step-by-step explanation:
Angles on straight line are equal;


Vertical angles are equal,

Complementary angles add up to 90°.

Angles on straight line adds up to 180°


40 degrees , the other angle next to it is 60 because it is a vertical angle formation and then you use the 180 rule to find the missing angle
180-60-80
Answer is 40 mark brainy pls
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hope this helps
I think your answer is qt