it gives you a certain direction, north, south,east,west, and in-between!
C is the answer, i know this is late but it can at least help some one else maybe
The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
Answer:
Appalachian Plateau
Explanation:
The Appalachian Mountains are a mountain range that runs down the eastern United States.
The Appalachian Plateau is on their northwestern side and stretches from New York to Alabama.
Answer for first picture:
#1 = 43 degrees #2= 38 degrees
#3= 27 degrees #4= 45 degrees
Explanation for first picture:
All the angles are right angles. This means they all will equal 90 degrees! so if you take 90 degrees and subtract the one known angle you will have your answer! :)
Answer for 2nd picture:
#1 = X= 70 Y= 110
#2 = X= 102 Z= 102
#3 = X= 83 Y= 194
#4 = Y= 37 Z= 143
Explanation for second picture:
When you have angles like these the total will equal 360 degrees! look at the first pic, it shows 110 degrees, you also know that the angle across of it is equal to it. so together it equals 220 now subtract 360 - 220. you get 140. since you have two angles to figure out, you divide 140 into two. 140 / 2 = 70 degrees! you do the same steps for the rest of the problems!
( i am sorry for the bad explaining!)
