The two lines are not parallel. Instead of a paralleogram, you s

The two lines are not parallel. Instead of a paralleogram, you should expect to see an isosceles trapezoid.

By the way, the line of symmetry is exactly the perpendicular bisector of the line segment connecting (0,2) and (4,0).

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• 回复：The two lines are not parallel. Instead of a paralleogram, yo -rlmom- ♀ (248 bytes) () 09/04/2010 postreply 07:39:48