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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!)

answer; round wood logs, building materials like (plywood),also pulp and paper products;