如图⊙O的半径为1,过点A(2,0)的直线切⊙O于点B,交y轴于点C.
(1)求线段AB的长;
(2)求以直线AC为图象的一次函数的解析式.
(1)求线段AB的长;
(2)求以直线AC为图象的一次函数的解析式.
![](https://img.xkw.com/dksih/QBM/2019/4/12/2181030377496576/2183085039648768/STEM/84360201b34e44148c85bdb5153b8801.png?resizew=166)
18-19九年级上·全国·单元测试 查看更多[8]
更新时间:2019-04-15 18:40:47
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【推荐1】如图,经过点
的一次函数
与正比例函数
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/aeaf2886-7231-4bea-8855-34a856f6c512.png?resizew=148)
(1)求
,
,
的值;
(2)请直接写出不等式组
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb442fb1fe1a5d9768cf11c3e1b7ec5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd144e0e96e4236a14523e0729cacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1447dbe580ac5c825776995118e75acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e51c602f25c82c7db0bddaaac37e383.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/aeaf2886-7231-4bea-8855-34a856f6c512.png?resizew=148)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)请直接写出不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62944ce2b6f7c58a119bf06aef0beb84.png)
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【推荐2】在如图的平面直角坐标系中,直线
过点
,且与直线
交于点
,直线
与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/9eb074df-64a6-4d41-8196-3024d4e8b6a4.png?resizew=146)
(1)求直线
的函数表达式;
(2)若
的面积为9,求点
的坐标;
(3)若
是等腰三角形,请直接写出点
的坐标(不写过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22072091897bc19ec561f842a0f48f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ae99a84d89e9c877ff36a34a10197d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/9eb074df-64a6-4d41-8196-3024d4e8b6a4.png?resizew=146)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解答题-计算题
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【推荐1】如图,
为
的切线,
为切点,
是
上一点,过点
作
,垂足为
,
交
于点
.
,求
的度数;
(2)如图②,连接
并延长交
于点
,连接
,
,若
,
的半径为
,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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa30a9ee227af2b387cf6e028c20d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6882a8682d2199e01bed5289c62ce3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993dfdfb72d84ae1ddf808705302035b.png)
(2)如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4cccc32ecf828356d2423755bf4b300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
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解答题-证明题
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【推荐2】如图,
为
的直径,
为
的延长线上一点,作直线
交
于点
,连接
、
,使得
,过点
作
交
延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/bf944348-dd0c-4966-93c6-99d194b95f5a.png?resizew=167)
(1)求证∶ 直线
是
的切线;
(2)若
,
,求
的半径及
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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532a88f2121cd2223f30d9e8312a1faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0aaa5cf7dafac1b64eafe84cae5674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/bf944348-dd0c-4966-93c6-99d194b95f5a.png?resizew=167)
(1)求证∶ 直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-作图题
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【推荐1】如图是由完全相同的小正方形组成的
网格,每个小正方形的顶点叫做格点,
的三个顶点均在格点上,仅用无刻度的直尺在给定网格中画图(保留作图痕迹,用虚线表示).
上画出点D,使得
.
(2)在图2中的边
上画出点E,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb673c01678316348bd4c6f1f5c9df9.png)
(2)在图2中的边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
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【推荐2】永祚寺双塔,又名凌霄双塔,是山西省会太原现存古建筑中最高的建筑. 位于太原市城区东南向山脚畔.数学活动小组的同学对其中一塔进行了测量.测量方 法如下:如图所示,间接测得该塔底部点
到地面上一点
的距离为
,塔的顶端 为点
,且
,在点
处竖直放一根标杆,其顶端为
,在
的延长 线上找一点
,使
三点在同一直线上,测得
.
(1)方法 1,已知标杆
,求该塔的高度;
(2)方法 2,测得
,已知
,求该塔的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e537c041c2545c4fbc1924f44f943d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e6dca98e4169392aaf3ae0dfbd2027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ccd8cc6b0930a5a75beda5d757bf56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a87126a28fb1813c20f39042d972d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f57f005a9592ea89ae2a2cee6598c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5024cea709314485c4ac88e18004c1a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d641d6251a3d07aa63a0390673007c5d.png)
(1)方法 1,已知标杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1f95303d71fb0627f0300f192a62ce.png)
(2)方法 2,测得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce15a526d0a09dd1f12c400f9411fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a168cd77b97492f391b0223b3dd035ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/902721c5-4eba-4e62-8bd3-5f5f185ec857.png?resizew=366)
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