Answer:
45°
Explanation:
When 2 lines intersect at a point, opposite angles are congruent. Angles 8 and 9 are opposite angles, so these are called vertical angles.
If angle <9 is 45 degrees, then <8 is also 45 degrees.
Hope this helps! :)
Answer: 45
vertical angle theorem says that when you have intersecting lines, the angles across are equal
so <9 = <8 = 45
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