如图,在菱形ABCD中,对角线AC、BD相交于点O.
(1)平移△AOB,使得点A移动到点D,画出平移后的三角形(不写画法,保留画图痕迹);
(2)在第(1)题画好的图形中,除了菱形ABCD外,还有哪种特殊的平行四边形?请给予证明.
考点分析:
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解方程
(1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460019_ST/0.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460019_ST/1.png)
=1
(2)x
2-1=4(x-1)
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计算
(1)(-1)
2003+6×(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460018_ST/0.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460018_ST/1.png)
)+
(2)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460018_ST/3.png)
+tan60°+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460018_ST/4.png)
.
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如图,在反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460017_ST/0.png)
上有两点A(3,2),B(6,1),在直线y=-x上有一动点P,当P点的坐标为
时,PA+PB有最小值.
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如图,PA、PB是⊙O的切线,A、B是切点,点C是劣弧AB上的一个动点(点C不与点A、点B重合),若∠P=30°,则∠ACB的度数是
°.
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已知x
1,x
2是关于x的一元二次方程x
2-2x-1=0的两个实数根,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460015_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193639643546061/SYS201311011936396435460015_ST/1.png)
-x
1x
2=
.
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