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示例如图1,在网格中有一条折线ABCDE,求作一条折线AFGHE,使得AF⊥AB,FG⊥BC,GH⊥CD,HE⊥DE.
Example As shown in Figure 1, in the grid there is a broken line ABCDE, seeking a broken line AFGHE, making AF ⊥ AB, FG ⊥ BC, GH ⊥ CD, HE ⊥ DE.