1 . 有一支队伍长
,以速度
匀速前进.排尾的传令兵因传达命令赶赴排头,到达排头后立即返回,往返速度不变,如果传令兵回到排尾时,全队正好前进了
,则传令兵往返行走的路程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b339b8698d48e586dfd3396b079c754f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b339b8698d48e586dfd3396b079c754f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 选修4-1:几何证明选讲
如图,
是圆
上两点,延长
至点
,满足
,过
作直线
与圆
相切于点
,
的平分线交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/5/1572997690490880/1572997696634880/STEM/f48620c503224302b8a492b81d12c0ea.png?resizew=131)
(1)证明:
;
(2)求
的值.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/9/5/1572997690490880/1572997696634880/STEM/f48620c503224302b8a492b81d12c0ea.png?resizew=131)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c163a189c44fd9e9234bedd4dd96625c.png)
您最近一年使用:0次
2016-12-04更新
|
439次组卷
|
3卷引用:2016年内蒙古包头市高三学业水平测试与评估(二)数学理试卷
3 . 如图,已知
是⊙
的直径,
是⊙
的弦,
的平分线
交⊙
于
,过点
作
交
的延长线于点
,
交
于点
.若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/0e67ee44-e028-4345-9534-0d3906811332.png?resizew=181)
(1)
//
;
(2)求
的值.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf253af4f8c82dad9e17ec2eae47346.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/0e67ee44-e028-4345-9534-0d3906811332.png?resizew=181)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5046ccb891c8fcc0fe805a98f157717a.png)
您最近一年使用:0次
11-12高三上·内蒙古巴彦淖尔·期中
4 . 如图,AB是半圆的直径,C是AB延长线上一点,CD切半圆于点D,CD=2,
,垂足为E,且E是OB的中点,求BC的长.
![](https://img.xkw.com/dksih/QBM/2011/12/28/1570637123715072/1570637129138176/STEM/65620ace4dc047cba5f23bdd10a14db3.png?resizew=68)
![](https://img.xkw.com/dksih/QBM/2014/5/15/1571723428175872/1571723433828352/STEM/52e10cf5-3607-43b4-8930-8355d551c34a.png?resizew=204)
您最近一年使用:0次