解答题-证明题 困难0.15 引用1 组卷335
如图1,四边形ABCD为菱形,∠DAB=60°,AB=12,点P为对角线AC上一点.
(1)连接PB、PD,求证:PB=PD;
(2)如图2,点Q为AD中点,以P为圆心,PQ长为半径作圆,
①当⊙P与AD相切时,判断⊙P与AB的位置关系并说明理由(利用图1画出草图);
②当⊙P经过菱形ABCD的某顶点时,求CP的长.
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316955496701952/2318305451155457/STEM/722142db5e684a6baf6c7880cd9909c2.png?resizew=256)
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316955496701952/2318305451155457/STEM/642259846f15463ba2018926cd3c7499.png?resizew=246)
(1)连接PB、PD,求证:PB=PD;
(2)如图2,点Q为AD中点,以P为圆心,PQ长为半径作圆,
①当⊙P与AD相切时,判断⊙P与AB的位置关系并说明理由(利用图1画出草图);
②当⊙P经过菱形ABCD的某顶点时,求CP的长.
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316955496701952/2318305451155457/STEM/722142db5e684a6baf6c7880cd9909c2.png?resizew=256)
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316955496701952/2318305451155457/STEM/642259846f15463ba2018926cd3c7499.png?resizew=246)
19-20九年级上·江苏泰州·阶段练习
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