已知梯形
中,
,设
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/fa5475de-a01d-4c73-b9b5-61dee0545898.png?resizew=256)
(1)如图①,若
,且
,求证:
.
(2)如图②,若
且
,作
交
于
,直线
恰好平分四边形
的周长,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c52b857c7ca55dfa6da108df1d3cee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8b617c2e617e996aa143787754f0f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a978e57e8d08ca663f9ee2ca41184b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/fa5475de-a01d-4c73-b9b5-61dee0545898.png?resizew=256)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e2c8d466ab8eb5ecd38060b53bbe8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae8cd75b68f412bf2b33e62258506bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025a7d74f1a938152bfb1a8c13cdc9d4.png)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68df3aa79bd6a3f74d1a756bcd6d210c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea30121aae4ce82e603ac45d21da808d.png)
更新时间:2019-11-13 20:37:38
|
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在平面四边形ABCD中,AC=4,BC⊥CD.
(1)若AB=3,BC=2,CD=5,求
的面积;
(2)若
,求
的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/17/7422992b-a918-4d08-82c2-abd7bd8aa795.png?resizew=146)
(1)若AB=3,BC=2,CD=5,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a52f460292281ed4fc0f48d72d9642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700b92106c301a8b7f7255e0fb33784e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在四边形
中,对角线
交于点P,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/559fe3df-a79c-4e1f-97ad-e5d22a8d9960.png?resizew=216)
(1)求证:
;
(2)若
,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da51bc68df0c03f7cf81e03136fd690a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/559fe3df-a79c-4e1f-97ad-e5d22a8d9960.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c01c42bbb7a051ee5e5e60c79b8ae0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0858af3c08375b4fbef381dbbf60277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次