Answer:
The two in the middle are the negatives and the two that are on the sides are positive.
Answer:
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Step-by-step explanation:
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Answer:
The angle C measures 120 degrees.
Step-by-step explanation:
For a polygon of n sides, the sum of internal angles, in degrees is given by:

Parallelogram
4 sides, so

Two pairs of equal angles
B and D measure 60
A and C measure x. So




The angle C measures 120 degrees.