如图,在
中,
,
于点
,
为
边上的中线.
(1)若
,求
的度数;
(2)若
,
,求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/2023/6/3/76e23193-5032-442d-9d12-70df71129ff5.png?resizew=176)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15d7d8b1b15a0dc79d6d482c1cf8889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbb7f41575664bf14fb6207b8a0c5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
2023·浙江杭州·二模 查看更多[2]
更新时间:2023-05-31 17:29:08
|
相似题推荐
解答题-问答题
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名校
【推荐1】如图,海上有一灯塔P,位于小岛A南偏西
方向上,一艘轮船从小岛A出发,沿北偏西
方向航行120海里到达B处,这时测得灯塔P在南偏东
方向上,求此时轮船与灯塔P的距离.(结果保留根号)
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【推荐2】如图已知
和
都是等腰直角三角形.
(1)如图1,连接
,
,此时
,
的数量关系为___________请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/11/16/3111030336389120/3146933678284800/STEM/669bdaaf728f42fe867818688ea2faf8.png?resizew=125)
(2)若将
绕点
顺时针旋转,如图2,当点
恰好在
边上时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://img.xkw.com/dksih/QBM/2022/11/16/3111030336389120/3146933678284800/STEM/669bdaaf728f42fe867818688ea2faf8.png?resizew=125)
(2)若将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837e26cafeff7210ce8ba35868e12b77.png)
![](https://img.xkw.com/dksih/QBM/2022/11/16/3111030336389120/3146933678284800/STEM/4fb4670329c043a98e3a570bda0bab25.png?resizew=137)
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【推荐1】[教材呈现]如图是华师版九年级上册数学教材第103页的部分内容.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/7532e314-856d-402d-98c4-85e99161aa18.png?resizew=382)
(1)请根据教材提示,结合图1,写出完整的证明过程.
(2)[结论应用]如图2,直角三角形
纸片中,
,点
是
边上的中点,连结
,将
沿
折叠,点
落在点
处,此时恰好有
.若
,那么
长为______.
(3)如图3,在
中,
是
边上的高线,
是
边上的中线,
是
的中点,
.若
,求
.
例2如图,在![]() ![]() ![]() ![]() 证明:延长 ![]() ![]() ![]() ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/7532e314-856d-402d-98c4-85e99161aa18.png?resizew=382)
(1)请根据教材提示,结合图1,写出完整的证明过程.
(2)[结论应用]如图2,直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c28be5dccf0a867ad905c3124d45277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)如图3,在
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8fb32ae05a9c1abd3374f5c5f7a999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa7cefa293103fd19896befdfed8ccb.png)
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【推荐2】如图,四边形
中,
,点
是
的中点,
.求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed490ea3c52866389430149a51c4a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2292702ebc75724359ed36184438db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/ded1cbbd-2a4f-4d6d-8c5a-866e85ee328b.png?resizew=123)
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真题
【推荐1】如图,抛物线
与
轴相交于A,B两点,与y轴相交于点C,对称轴为直线
,顶点为D,点B的坐标为
.
(1)填空:点A的坐标为_________,点D的坐标为_________,抛物线的解析式为_________;
(2)当二次函数
的自变量:满足
时,函数y的最小值为
,求m的值;
(3)P是抛物线对称轴上一动点,是否存在点P,使
是以AC为斜边的直角三角形?若存在,请求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e48755459575c9959349d8811fd55d.png)
(1)填空:点A的坐标为_________,点D的坐标为_________,抛物线的解析式为_________;
(2)当二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dafa09346e8a6af1e994b8f2d6212b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
(3)P是抛物线对称轴上一动点,是否存在点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/2086c2f7-4102-41ac-baab-fdcbd3cf0680.png?resizew=236)
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【推荐2】如图,
是
的直径,C是
上一点,连接
,过点B作
的切线,交
的延长线于点D,在
上取一点E,使
,连接
,交
于点F,连接
.
;
(2)过点E作
于点G,如果
,
,求
,
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee759fd79ce3a02b3df32d248f7f684.png)
(2)过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cd81afc27aa4b51f3d41c953e22964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0cf182c8fc60865d49a92ba569512c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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解题方法
【推荐1】如图,AB是⊙O的直径,
是⊙O的弦,BC是⊙O的切线,切点为B,
,BA、CD的延长线相交于点E.
![](https://img.xkw.com/dksih/QBM/2021/4/20/2703983223300096/2704439450845184/STEM/d8791a685c6f4cafa564492cbad0150c.png?resizew=180)
(1)求证:CD是⊙O的切线
(2)若⊙O的半径为4,ED=3AE,求AE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb7c9b5376c6d491e743b710bc25701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d145b99d806022108f8f9165dd9b5244.png)
![](https://img.xkw.com/dksih/QBM/2021/4/20/2703983223300096/2704439450845184/STEM/d8791a685c6f4cafa564492cbad0150c.png?resizew=180)
(1)求证:CD是⊙O的切线
(2)若⊙O的半径为4,ED=3AE,求AE的长.
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【推荐2】如图,四边形
内接于
,
为直径,
,过点C作
于点E,
交
的延长线于点H,连接
交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/e4fa7696-393b-453d-8937-e805fac0acea.png?resizew=155)
(1)求证:
是
的切线:
(2)若点D为
的中点,求证:
;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f86d9ca130443b8effd507f50364c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/e4fa7696-393b-453d-8937-e805fac0acea.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447b52f9668a62b8906bd1139955e4d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae0d69c4d74219520f7a33c5f58892e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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