解答题-证明题 适中0.65 引用2 组卷95
已知:在△ABC中,AB=6,AC=5,△ABC的面积为9.点P为边AB上动点,过点B作BD∥AC,交CP的延长线于点D.∠ACP的平分线交AB于点E.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987882245726208/2989133065666560/STEM/9aae1d43-a1f9-487b-9e37-5b65b3bb45fc.png?resizew=419)
(1)如图1,当CD⊥AB时,求PA的长;
(2)如图2,当点E为AB的中点时,请猜想并证明:线段AC、CD、DB的数量关系.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987882245726208/2989133065666560/STEM/9aae1d43-a1f9-487b-9e37-5b65b3bb45fc.png?resizew=419)
(1)如图1,当CD⊥AB时,求PA的长;
(2)如图2,当点E为AB的中点时,请猜想并证明:线段AC、CD、DB的数量关系.
2022七年级下·上海·专题练习
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