Answer:
26.9
Explanation:
angle u is equal to the space next to 63.1, because of Opposite Angle Theory. We'll call this x
63.1 + x = 90
x = 90 - 63.1
x = 26.9
Therefore, x = u = 26.9
The correct answer is 26.9
You know that the total angle measurement of angle u and 63.1 is 90 degrees. If you subtract 63.1 from 90, you get 26.9, which is the measurement to angle u.
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