How to do this ? i don't understand how to do this

Ok, so on the top, the angle is 100 degrees on a line, a line is a 180 degree angle so the angle to the left of that top angle is 80 degrees, 80 - 10 would give you the answer for x because (x + 10) is equal to the angle to the left of the 100 degree angle

Idon't know. the question you are trying to ask doesn't make sense.

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.