Junior high school mathematics problems [to be analyzed] - Training Enrollment Network

Junior high school mathematics problems [to be analyzed]

Prove that ∵ABCD is a parallelogram.

∴AD//BC

∴? BGM∽？ AGH

∴MG/HG=BG/AG= 1

∴MG/MH= 1/2

∵EF⊥AD MH//EF

∴HFEM is rectangular.

∴EF=MH ∴MG/EF= 1/2

∠∠EDF =∠2∠ 1 =∠2

∴∠ 1=∠EDF

∠ DFE =∠ EMG = 90。

∴? EMG∽？ Ministry of Education

∴ME/DF=MG/FE= 1/2

∴DF=2ME

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