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Serf
I don't know exactly what your looking for but, it could do with religion or different ideas of the country.
For example: Let's say that America goes to war with Russia and the Americans didn't want to go to war. The people have a differed idea from the government, meaning that the military does not have the peoples support.
Hope it helps!
The shape would be a trapezoid, because trapezoids always have two sets of equivalent angles, while others don't. Like squares and rectangles have all 90 degree angles.
Answers are in attached photo. Good luck