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已知，正方形ABCD中，AB＝8，点P是射线BC上的一动点，过点P作PE⊥PA交直线CD于E，连AE． （1）如图1，若BP＝2，求DE的长； （2）如图2，若AP平分∠BAE，连PD，求tan...
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如图1已知正方形ABCD在直线MN的上方BC在直线MN上E.是线段BC上一点以AE为边在直线MN的上
如图1正方形ABCD中点P.为线段BC上一个动点若线段MN垂直AP于点E.交线段AB于M.CD于N.
如图正方形ABCD中AB=4E.是BC的中点点P.是对角线AC上一动点则PE+PB的最小值为.
如图1已知正方形ABCD在直线MN的上方BC在直线MN上E.是BC上一点以AE为边在直线MN的上方作
如图正方形ABCD的边长为4点P在DC边上且DP=1点Q是AC上一动点则DQ+PQ的最小值为5.
如图在正方形ABCD中E是AB上一点BE=2AE=3BEP是AC上一动点则PB+PE的最小值是.
如图在正方形ABCD中E是AB上一点BE=2AE=3BEP是AC上一动点则PB+PE的最小值是.
如图1已知正方形ABCD在直线MN的上方BC在直线MN上E.是线段BC上一点以AE为边在直线MN的上
已知点O为正方形ABCD的中心M为射线OD上一动点M与点OD不重合以线段AM为一边作正方形AMEF连
如图在正方形ABCD中E.是AB上一点BE=1AE=3P.是AC上一动点则PB+PE的最小值是.
如图正方形ABCD中AB=4E是BC的中点点P是对角线AC上一动点则PE+PB的最小值为.
正方形ABCD的边长为1点E.在边AB上点F.在边BC上AE=BF=动点p从E.出发沿直线向F.运动
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF=BE.求证CE=CF2如图2
如图在边长为2的正方形ABCD中点Q.为BC边的中点点P.为对角线AC上一动点连接PBPQ则△PBQ
如图1已知正方形ABCD在直线MN的上方BC在直线MN上E.是BC上一点以AE为边在直线MN的上方作
已知如图正方形ABCD边长为1cm点E.在对角线BD上BE＝BCP.是CE上一动点PF⊥BDPG⊥B
已知正方形ABCD中边长为4E.为AB边上的一动点E.与A.B.点不重合设AE=x以E.为顶点的内接
如图已知正方形ABCD的边长是4点E.是AB边上一动点连接CE过点B.作BG⊥CE于点G.点P.是A
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF＝BE.求证CE＝CF2如图2
如图1已知正方形ABCD在直线MN的上方BC在直线MN上E是射线BC上一点以AE为边在直线MN的上
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