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(2009•茂名)如图,把抛物线y=x2与直线y=1围成的图形OABC绕原点O顺...
(2009•茂名)如图,把抛物线y=x
2与直线y=1围成的图形OABC绕原点O顺时针旋转90°后,再沿x轴向右平移1个单位得到图形O
1A
1B
1C
1,则下列结论错误的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230808678224757/SYS201310212308086782247006_ST/images0.png)
A.点O
1的坐标是(1,0)
B.点C
1的坐标是(2,-1)
C.四边形OBA
1B
1是矩形
D.若连接OC,则梯形OCA
1B
1的面积是3
考点分析:
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