Answer:
Step-by-step explanation:
Angles 1 and 3, angles 2 and 4, angles 5 and 7, and angles 6 and 8. They are also congruent, because vertical angles are congruent.
You take (8x - 6) then add 80 =90 then solve for x
8x-6+80 =90
x= 2
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