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Math and geometry application problems in the first day of junior high school
Question 1: Make a straight line L that intersects BC and DE at m and n respectively, then L is parallel to AB and DF, and it is easy to make it equal with parallel internal dislocation angles.

Question 2: BEF plus EFD equals 180, and there are two bisectors. What about PEF? PFE = 90°, so the angle P = 90.