Answer:
11.

10.

Step-by-step explanation:
In every rectangle, when you have two diagonal segment bisectors, you will always have a circumcentre showing all midpoints of both segment bisectors, however, it measures 120° going vertical and 60° going horisontal, so with that being said, you have your answers.
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* NOTE: Remember, the sum of the interior angles of ALL TRIANGLES is 180°.