体验:如图
,在四边形
中,
,
,点
在
边上,当
时,可知
______
不要求证明
.
探究:如图
,在四边形
中,点
在
上,当
时,求证:
∽
.
拓展:如图
,在
中,点
是边
的中点,点
、
分别在边
、
上,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0487441cafe2b5263cfbce41c6a8fa38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68eec2a6146ffc539bb04345575a43a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
探究:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b9b20a39c6ba43f4c3a9828a84e464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781e6927e3bc512359dc8b0c11e195d5.png)
拓展:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e073c5c8def27b08384204a1ee271e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0ecf99f87c482b90900fcadb8b17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ff13b4da65c7da3d898ba58e967b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/cc036498-6548-4915-8b66-755a4b1cbbe7.png?resizew=355)
更新时间:2023-11-24 15:15:52
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
与
中,
与
交于点
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/a880e9d0-1500-4dba-99a6-d6b264f4ce41.png?resizew=156)
(1)求证:
;
(2)当
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f0dadf037efedc90b39c57a6880a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439fbb8974a5f907205d26b47b420bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ada52a0dae5711ac607f5384b2532a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/a880e9d0-1500-4dba-99a6-d6b264f4ce41.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d00572a90232e08932317af2a53767.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874ece85c007b180b57a6c849841c284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cd9d0d73549e2944578f3513631ce5.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐2】如图,在
中,
,
,点D在线段
上运动(点D不与点B、C重合),连接
,作
,
交线段
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/10ae9544-c396-40c4-b70c-414b9e7c08f4.png?resizew=567)
(1)当
时,
___________,
___________;
(2)线段
的长度为何值时,
?请说明理由;
(3)在点D的运动过程中,
的形状可以是等腰三角形吗?若可以,请直接写出
的度数;若不可以,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce6c8659bfef1f79b0796d500b924a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197b35320788bed2841580941f470fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/10ae9544-c396-40c4-b70c-414b9e7c08f4.png?resizew=567)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb91add36bc65bf159c4005dad111346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06df3b822800139fd3ba2cb1ceaeaf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2ef38925946da1145a68651da67da9.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22cda279d3cd75eeb603b14a3b94e420.png)
(3)在点D的运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b47abcacc10f90489c0d52a9e269ab.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
,
的角平分线交
于点D,点O在
上,以点O为圆心,
为半径的圆恰好经过点D,分别交
、
于点E,F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/af221a72-00df-4c67-822d-212da1919c52.png?resizew=170)
(1)试判断直线
与⊙O的位置关系,并说明理由;
(2)若
,
,求⊙O的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/af221a72-00df-4c67-822d-212da1919c52.png?resizew=170)
(1)试判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb80254d3581bf660a0bfd376de9dc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faffe3765c15f53305516895aa595a9b.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,AD∥BC,AC⊥AB,AB=3,AC=CD=2.
(1)求BC的长;
(2)求BD的长.
(1)求BC的长;
(2)求BD的长.
![](https://img.xkw.com/dksih/QBM/2019/8/1/2259403503345664/2261036126822400/STEM/0d28080fa6c840a6b9e08d33856c37ee.png?resizew=239)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,四边形ABCD内接于⊙O,对角线AC为⊙O的直径,过点C作AC的垂线交AD的延长线于点E,点F为CE的中点,连接DB,DC,DF.
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957592409513984/2958605686759424/STEM/9d353e1acf7a4275b165f2a2810015c6.png?resizew=123)
(1)求证:DF是⊙O的切线;
(2)若AC=
DE,求tan∠ABD的值.
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957592409513984/2958605686759424/STEM/9d353e1acf7a4275b165f2a2810015c6.png?resizew=123)
(1)求证:DF是⊙O的切线;
(2)若AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】如图所示,AC为⊙O的直径且PA⊥AC,BC是⊙O的一条弦,直线PB交直线AC于点D,
.(1)求证:直线PB是⊙O的切线;
(2)求cos∠BCA的的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1d58e1da74d39ff81c68eaa68ed5b41.png)
(2)求cos∠BCA的的值.
![](https://img.xkw.com/dksih/QBM/2018/5/14/1945205431025664/1951022087061504/STEM/2f86177cee9445a3ba4d7f40e12df9dc.png?resizew=249)
您最近一年使用:0次