Answer:
80
Step-by-step explanation:
The opposite angles in a cyclic quadrilateral are supplementary. The sum of the opposite angles is equal to 180˚
x+100=180
x=180-100=80
Answer:

Step-by-step explanation:
Answer:
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Step-by-step explanation:
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Answer:
dont really know buy im thinking its A.
Step-by-step explanation:
hope this helps somewhat