如图,在△ABC中,AB=26,BC=20,边BC上的中线AD=24.求AC.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/29/f410d83e-10b0-44d5-9779-52f9e7b5e580.png?resizew=95)
更新时间:2016-12-06 12:26:29
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在△ABC中,已知AB=10,BC=8,AC=6,CD是△ABC的中线,CE⊥AB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/ec4a2f54-42cf-4e9c-84f0-0f54a3369ec0.png?resizew=135)
(1)求CD的长;
(2)求DE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/ec4a2f54-42cf-4e9c-84f0-0f54a3369ec0.png?resizew=135)
(1)求CD的长;
(2)求DE的长.
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解答题-作图题
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适中
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【推荐2】如图是
正方形网格,已知格点
,
,请仅用无刻度的直尺按下列要求作图.
中,以
为腰,在格点上找点
,作等腰
,使其面积最小;
(2)在图
中,以
为斜边,在格点上找点
,作直角
,使其面积最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b91b84cf6c19db7fb12b6964ba46c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
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解答题-问答题
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适中
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【推荐1】 如图,在平面直角坐标系中,
为坐标原点,
的边
在
轴上,
两点的坐标分别为
,且
,点
从
出发以每秒2个单位的速度沿射线
匀速运动,设点
运动时间为
秒.
(1)直接写出
两点的坐标;A: C:
(2)连接
,当
的面积是10,求
的值?
(3)当
在射线
上运动时,是否存在一点
,使
是等腰三角形?若存在,求出满足条件的所有
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e478787ebfeb68a5a7594dbd9eecd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74d68d8846cc0387b22a99ee38b2e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d046f86b998a88cbd0050a581970f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/12/465ae005-7a02-4ca9-9585-26c6018dfefa.png?resizew=632)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e478787ebfeb68a5a7594dbd9eecd4.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,已知在平面直角坐标系中,
的面积为18,
,
,点P的坐标是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/cf841ad7-bbc5-483c-9147-9f5dd011ec8a.png?resizew=210)
(1)求顶点A的坐标___________;
(2)若点P在第二象限,若
的面积等于
的面积,求出点P的坐标.
(3)在x轴上找一点D,使得
为等腰三角形,直接写出点D 的坐标.
(4)求出当
的值最小时点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3a08add0f389dbe3f7f74575faf45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2ff567735b4bcd0e99983399d9743f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/cf841ad7-bbc5-483c-9147-9f5dd011ec8a.png?resizew=210)
(1)求顶点A的坐标___________;
(2)若点P在第二象限,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在x轴上找一点D,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(4)求出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
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