help please?

User Generated

angnyvr7gww

Mathematics

Description

Screen%20Shot%202014-08-06%20at%201.38.4

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Explanation & Answer

180(n-2)/n = 140.
180n-360 = 140n
-360 = -40n
n = 9  NONAGON

UV=1/2(XY+WZ)
XY=2UV-WZ
XY=2*29-40
XY=18


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