在
中,
,
是
边上的中线,
,求
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92000e277e40c0c00bbecd8c871d0e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef760255621872707e998dae5a5447aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c96d049465a04bb9d09f97c0d33f7f1.png)
20-21九年级下·全国·课后作业 查看更多[2]
更新时间:2021-10-22 08:04:15
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相似题推荐
解答题-证明题
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【推荐1】如图,平行四边形
中,点
分别在
的延长线上,
,
,垂足为点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/6d4aad8c-7c69-42c7-bed2-3596242cb871.png?resizew=150)
(1)求证:四边形
是平行四边形;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eceff9b68796f5ccd4daa4028e3a182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab47a785e0687f42e885e11497b7e969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51352936f13995f63cd74207c303971a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0ee3db4954e8858303c2ef19307e8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/6d4aad8c-7c69-42c7-bed2-3596242cb871.png?resizew=150)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-问答题
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【推荐2】如图,一架梯子
长
米,斜靠在墙上(墙与地面垂直),梯子底端至墙的距离
为
米.
距地面有多高?
(2)如果梯子的顶端下滑了
米,那么梯子的底端在水平方向滑动了几米?
(3)若梯子
的中点为
,梯子在下滑的过程中,
的长是否发生变化,如变化说明变化规律,如果不变直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98332ca603c91d0844ca2fb55763741b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8da10b2137a1e87801556a313e625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)如果梯子的顶端下滑了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(3)若梯子
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
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解答题-问答题
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真题
名校
【推荐1】如图,已知在Rt△ABC中,∠C=90°,AB=5,BC=3.求AC的长和sinA的值.
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
名校
【推荐1】如图,在
中,
是BC边上的高,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/fe2e8c76-4373-4d02-bfe8-a742d8a645cc.png?resizew=121)
(1)求线段
的长度:
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3a08add0f389dbe3f7f74575faf45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdf82f2b3ac77ee7b9b35aebe0dd83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905f306dc08525842a96cfcab32c1ce8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/fe2e8c76-4373-4d02-bfe8-a742d8a645cc.png?resizew=121)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9457997882356016ad252a2a9803afa3.png)
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解答题-作图题
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【推荐2】如图, 在
的正方形方格纸中,
的顶点在格点上,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/43444bf2-9548-4bcb-a5c2-e9230f2771ff.png?resizew=99)
(1)直接写出
.
(2)仅用直尺, 画出
的平分线
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/43444bf2-9548-4bcb-a5c2-e9230f2771ff.png?resizew=99)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bdfcf009619b9f8d6072adf07d81c7.png)
(2)仅用直尺, 画出
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次