Can somebody help me i dont get this

Z=110 degrees
A straight line is equal to 180 degrees. You determine the bottom to angles of the triangles first by subtracting the angle degrees by 180.

180-120=60
180-130=50

So now you have the bottom two angles of the triangle. All triangles add up to 180. So just add 50 and 60 together then subtract the answer from 180 to get the missing angle.

50+60=110
180-110=70

Now to find angle Z all you have to do is subtract 70 from 180.

180-70=110

Hope this helped!

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8doors on the second floor