document.write( "Question 1198961: B is the midpoint of line segment AD and line segment CE
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document.write( "We have:
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document.write( "1. |AB| = |BD|   (B is the midpoint of AD)
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document.write( "2. |CB| = |BE|   (B is the midpoint of CE)
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document.write( "3. ∠ABC = ∠DBE    (vertical angles are equal)\r
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document.write( "△ABC ≅ △DBE   by  SAS.\r
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