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20 13 Longyan middle school entrance examination mathematics, question 24, why is EH equal to the root number 3m and OE equal to 2m? Want to be more detailed.
The above sentence: Jean = Mi Tan

EH=OH* root number 3

According to pythagorean theorem OE 2 = OH 2+EH 2 = 3m 2+m 2 = 4m 2 OE = 2m.