真题
1 . 尺规作图(不写作法,保留作图痕迹):
已知线段
和
,点
在
上(如图所示).
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/2ee5241c191e486da6a74026b825c64d.png)
(1)在
边上作点
,使
;
(2)作
的平分线;
(3)过点
作
的垂线.
已知线段
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/0160471768b047c7a7df5e3a0319dc57.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/5d05bdc57193491286d86412f055ea21.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/975aa6fcb37145239343698eba634abb.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/a4194c53688c4dd0a63384d03fe0a2a1.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/2ee5241c191e486da6a74026b825c64d.png)
(1)在
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/2e812d422de141a880e03df19ecd79dd.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/ad1969f7cb0a4e9e80d1620834310188.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/74767052cfee440699f002f3700d5b0c.png)
(2)作
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/5d05bdc57193491286d86412f055ea21.png)
(3)过点
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/975aa6fcb37145239343698eba634abb.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647392256/STEM/a4194c53688c4dd0a63384d03fe0a2a1.png)
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真题
2 . 已知△ABC中,∠A=25°,∠B=40°.
(1)求作:⊙O,使⊙O经过A、C两点,且圆心落在AB边上;
(要求:尺规作图,保留作图痕迹,不写作法.)
(2)求证:BC是(1)中所作⊙O的切线.
(1)求作:⊙O,使⊙O经过A、C两点,且圆心落在AB边上;
(要求:尺规作图,保留作图痕迹,不写作法.)
(2)求证:BC是(1)中所作⊙O的切线.
![](https://img.xkw.com/dksih/QBM/2017/11/21/1821915827748864/1822019760955392/STEM/9fa8da2a6c1f4533bd61ba966daa8bd7.png?resizew=145)
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2011·广东佛山·中考真题
真题
3 . 如图,一张纸上有线段AB;
(1)请用尺规作图,作出线段AB的垂直平分线(保留作图痕迹,不写作法和证明);
(2)若不用尺规作图,你还有其它作法吗?请说明作法(不作图);
(1)请用尺规作图,作出线段AB的垂直平分线(保留作图痕迹,不写作法和证明);
(2)若不用尺规作图,你还有其它作法吗?请说明作法(不作图);
![](https://img.xkw.com/dksih/QBM/2011/8/15/1573241756532736/1573241799868416/STEM/007129d7-e0a7-4c2f-99e1-867dcf8b59f5.png)
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