Trường Sơn Nguyễn
07/08/2017 at 13:05-
Because : BD // AE
=> \(\widehat{DBA}=\widehat{BAE}\) (2 Alternate interior angles)
In another face , we got : \(\widehat{DBA}=\widehat{BEA}\) (2 Corresponding angles)
So \(\widehat{BAE}=\widehat{BEA}\)
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