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已知λ，μ∈R，△ABC所在平面内一点P满足，则＝（ ）
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高一下学期数学《》真题及答案
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已知P.为△ABC所在平面α外一点PA=PB=PC则P.点在平面α内的射影一定是△ABC的
内心
外心
垂心
重心
已知△ABC中AB=4AC=5点O为△ABC所在平面内一点满足则=．
已知点O.为△ABC所在平面内一点且则点O.一定为△ABC的
外心
内心
垂心
重心
已知A.B.C.三点不共线对平面ABC外的任一点O.若点M.满足1判断三个向量是否共面2判断点M.是
已知点P为△ABC所在平面内一点且满足=λ+λ∈R则直线AP必经过△ABC的
重心
内心
垂心
外心
已知点P为△ABC所在平面内一点且满足=λ+λ∈R则直线AP必经过△ABC的
重心
内心
垂心
外心
.已知O.是三角形ABC所在平面内一点且满足则点O.在
AB边中线所在的直线上
∠
平分线所在的直线上 C. 与AB垂直的直线上
三角形ABC的外心
P.为△ABC所在平面上一点且满足m>0若△ABP的面积为8则△ABC的面积为___
已知P是△ABC所在平面内一点现将一粒黄豆随机撒在△ABC内则黄豆落在△PBC内的概率是
1/3
1/2
1/4
2/3
如图在△ABC中AC=BC＞AB点P.为△ABC所在平面内一点且点P.与△ABC的任意两个顶点构成△
已知△ABC的三个顶点的
B.C.及平面内一点P.满足
， 下列结论中正确的是 （ ） A.P.在△ABC内部
P.在△ABC外部
P.在AB边所在直线上
P.是AC边的一个三等分点
点O.是三角形ABC所在平面内的一点满足则点O.是的______填重心垂心外心内心
已知O.是△ABC所在平面内的一定点动点P.满足则动点P.的轨迹一定通过△ABC的
内心
重心
外心
垂心
已知点O.为△ABC所在平面内一点且则O.一定为△ABC的
垂心
重心
外心
内心
已知点O.为D.ABC所在平面内一点且则O.一定为D.ABC的
外心
内心
垂心
重心
已知O为△ABC所在平面内一点且满足求证O为△ABC的垂心．
已知点O.为△ABC所在平面内一点且则点O.一定为△ABC的
外心
内心
垂心
重心
在△ABC所在的平面内有一点P.满足则△PBC与△ABC的面积之比是________.
已知平面内一点P∈{xy|x﹣2cosα2+y﹣2sinα2=16α∈R}则满足条件的点P在平面内所
已知△ABC的面积为12P.是△ABC所在平面上的一点满足则△ABP的面积为________.
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计算﹣12019+×sin60°﹣﹣3．
下列说法正确的是
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下列运算正确的是
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已知∠AOB＝60°OC是∠AOB的平分线点D为OC上一点过D作直线DE⊥OA垂足为点E且直线DE交OB于点F如图所示．若DE＝2则DF＝．
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如图直线y＝4﹣x与双曲线y＝交于AB两点过B作直线BC⊥y轴垂足为C则以OA为直径的圆与直线BC的交点坐标是．
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， 下列结论中正确的是 （ ） A.P.在△ABC内部 P.在△ABC外部 P.在AB边所在直线上 P.是AC边的一个三等分点
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