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20 1 1 how to solve the eighth multiple-choice question in mathematics for the senior high school entrance examination in Hangzhou?
As shown in the figure, it is known that each internal angle of a regular hexagonal prism is 120, ∠ 1 = 60 ∠ 2 = 30? ∴ x = radical 3a, Z=4-2X, Z=Y=2X.

∴4-2X=2X, ∴X= 1,∴a= root number 3.

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