如图,
,则下列关系式不一定成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/ed42287f-7b45-4249-8ed1-dd32fc8d7343.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af052adab7466ab26420387545b0380.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/ed42287f-7b45-4249-8ed1-dd32fc8d7343.png?resizew=141)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2024-03-26 23:56:54
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【推荐1】已知四边形
的对角线
相交于点
,下列条件中,不能判定四边形
是平行四边形的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,直线
,直线
于点A,直线
于点B,点P从点A出发,沿着箭头方向前进,速度为
;同时点Q从点B出发,沿着箭头方向前进,速度为
.两点的运动时间为
,直线a与b之间的距离为
,则当点P与点Q距离最近时,t的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a4352562ae8aa968014fd0d931b677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e632af72cc3090cdcc4e29d5424c6bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e02aa2172c7e85522a88f0ff772e728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79789686104cab147c239d152271e076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab02b0a664b7afd2632a159adaab336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
A.5 | B.6 | C.10 | D.15 |
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解题方法
【推荐1】如图,直线a//b,一块含60°角的直角三角板ABC(∠A=60°)按如图所示放置.若∠1=43°,则∠2的度数为( )
![](https://img.xkw.com/dksih/QBM/2020/7/5/2499284780064768/2500752400506880/STEM/e159e585-cf8b-48e8-868a-dbe8c662b68b.png)
![](https://img.xkw.com/dksih/QBM/2020/7/5/2499284780064768/2500752400506880/STEM/e159e585-cf8b-48e8-868a-dbe8c662b68b.png)
A.101° | B.103° | C.105° | D.107° |
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名校
【推荐2】下列命题正确的是( )
A.三角形的一个外角等于两个内角的和 | B.在反比例函数![]() ![]() ![]() |
C.两条直线被第三条直线所截,同位角一定相等 | D.在圆中,垂直于弦的直径平分弦 |
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【推荐1】如图,在△ABC中,∠ACB=90°,CD⊥AB,垂足为D.下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/8/30/2280077217062912/2282208392503296/STEM/5020a5fb939c40829561a0375f4f3d2f.png?resizew=194)
![](https://img.xkw.com/dksih/QBM/2019/8/30/2280077217062912/2282208392503296/STEM/5020a5fb939c40829561a0375f4f3d2f.png?resizew=194)
A.与∠1互余的角只有∠2 | B.∠A与∠B互余 |
C.∠1=∠B | D.若∠A=2∠1,则∠B=30° |
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【推荐2】如图,等边
中,
,
分别在
,
边上,且
,
与
交于点
,
于点
,下列结论:①
;②
;③
是等腰三角形;④
,其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/fa4cbc65-c5eb-4023-9e05-32129e281bf8.png?resizew=206)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c39d2c88a214e6daeb62ddba4686b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae933eedefecdf4eb2fe7d162ff80a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da70d43468fcc6d1832d4e9960681b8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/fa4cbc65-c5eb-4023-9e05-32129e281bf8.png?resizew=206)
A.1个 | B.2个 | C.3个 | D.4个 |
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