如图,在
中,
,点
为
上一点,且
,过
、
、
三点作
,
是
的直径,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/9935f9ac-b5ab-4c34-aee7-fac58ff99dfe.png?resizew=180)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/9935f9ac-b5ab-4c34-aee7-fac58ff99dfe.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9016cc0783d18bbab8ec3d9e2ae25ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53e3cd4566cc35d715806d5fca506db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
更新时间:2023-04-06 14:46:25
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相似题推荐
解答题-问答题
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(0.4)
【推荐1】如图,在平面直角坐标系中,△ABO的边BO在x轴上,点A坐标(5,12),B(17,0),点C为BO边上一点,且AC=AO,点P为AB边上一点,且OP⊥AC.
(1)求出∠B的度数;
(2)试说明OA=OP;
(3)求点P的坐标.
(1)求出∠B的度数;
(2)试说明OA=OP;
(3)求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2021/12/5/2865742509301760/2869425025400832/STEM/40653309-e34f-4595-8809-0105fcead710.png?resizew=293)
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【推荐2】如图,在△ABC中,AD是BC边上的中线,且AD=AC,DE⊥BC,DE与AB相交于点E,EC与AD相交于点F.
(1)求证:△ABC∽△FCD;
(2)过点A作AM⊥BC于点M,求DE:AM的值;
(3)若S△FCD=5,BC=10,求DE的长.
(1)求证:△ABC∽△FCD;
(2)过点A作AM⊥BC于点M,求DE:AM的值;
(3)若S△FCD=5,BC=10,求DE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/f8f33aae-c7dc-4773-95b5-ae4ff95d6307.png?resizew=162)
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解题方法
【推荐1】已知:一次函数
的图象为直线
,二次函数
的图象为抛物线
.
(1)若当
时均有
.求实数a的值.
(2)设抛物线
与y轴的交点为A,与x轴的两个交点分别为B、C,△ABC外接圆的圆心为点P,证明:圆P与y轴的另一个交点为定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5fe0ed1b1d14dbce50eb2b8b1da48e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829203f36b9cc4e04a80139246015a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a4332f7f852ff882d50968069edc88.png)
(2)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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【推荐2】如图,
中,以
为直径的
交
于点D,
是
的切线,且
,垂足为E,延长
交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/a8a2b1e0-f1b3-4b79-9139-3d0fe0117ab2.png?resizew=209)
(1)求证:
;
(2)若
,求AF的长.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/a8a2b1e0-f1b3-4b79-9139-3d0fe0117ab2.png?resizew=209)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af2ab828068c27f8612398da32492e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df626c905da4d493c4b965940d170f8.png)
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名校
【推荐1】如图,
是
的直径,点C是半圆
的中点,点D是
上一点,连接
交
于E,点F是
延长线上一点,且
.
是
的切线;
(2)连接
,若
,
,求
的半径.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ac03e0b1559d3a64fefe22b807f6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a126d6397830d1bc6b7c7b9f1ff49c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a091e9e93d56b9515bcb35ee72602250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc95af9238cf516b1f60fd4c51b409a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】如图,
是圆
的直径,
为圆心,
、
是半圆的弦,且
.延长
交圆的切线
于点
.
(1)判断直线
是否为
的切线,并说明理由;
(2)如果
,
,求
的长.
(3)将线段
以直线
为对称轴作对称线段
,点
正好在圆
上,如图2,求证:四边形
为菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/e9660462206b94609fcae2b9ce17cd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/27/aa1b9de5-263c-49a7-9930-a44f095b114a.png?resizew=455)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844659a605e726781cb3cf3ee3f31156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(3)将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466a12cf2d11494ec4f7173e904932a9.png)
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解题方法
【推荐1】如图1,抛物线y=ax2+bx+c与x轴交于A(1,0)、B(4,0)两点,与y轴交于点C(0,﹣3),抛物线顶点为点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/e026f824-8dd4-445e-8944-889b7b4fe830.png?resizew=589)
(1)求抛物线的解析式;
(2)如图2,P是抛物线上直线BC上方的一点,过点P作PQ⊥BC于点Q,求PQ的最大值及此时P点坐标;
(3)抛物线上是否存在点M,使得∠BCM=
∠BCO?若存在,求直线CM的解析式.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/e026f824-8dd4-445e-8944-889b7b4fe830.png?resizew=589)
(1)求抛物线的解析式;
(2)如图2,P是抛物线上直线BC上方的一点,过点P作PQ⊥BC于点Q,求PQ的最大值及此时P点坐标;
(3)抛物线上是否存在点M,使得∠BCM=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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解题方法
【推荐2】如图1,在平面直角坐标系中,直线y=﹣
x+3与x轴交于点A,与y轴交于点B,抛物线过点A、B和点C(﹣4,0).
(1)求抛物线的解析式;
(2)如图1,连接BC,若点P在线段AB上方的抛物线上移动,过点P作PQ∥BC交AB于Q点,求4PQ+
BQ的最大值及此时点P的坐标;
(3)如图2,将该抛物线沿射线CB的方向平移5个单位长度得到新抛物线,平移后的新抛物线与原抛物线交于点R,M点在新抛物线的对称轴上,在平面内是否存在点N,使得以点A、R、M、N为顶点的四边形为矩形?若存在,请直接写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求抛物线的解析式;
(2)如图1,连接BC,若点P在线段AB上方的抛物线上移动,过点P作PQ∥BC交AB于Q点,求4PQ+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
(3)如图2,将该抛物线沿射线CB的方向平移5个单位长度得到新抛物线,平移后的新抛物线与原抛物线交于点R,M点在新抛物线的对称轴上,在平面内是否存在点N,使得以点A、R、M、N为顶点的四边形为矩形?若存在,请直接写出点N的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/3566eba5-4fcc-41a2-a07a-ce3dd349848c.png?resizew=508)
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