已知ab=8⊙o经过点ab以ab为一边画平行四边形abcd另一边cd经过点o一点b为圆心bc为半径画弧交线段oc于点e．1 Sketch Coloring Page

已知ab=8⊙o经过点ab以ab为一边画平行四边形abcd另一边cd经过点o一点b为圆心bc为半径画弧交线段oc于点e．1 Template

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tomski已知ab=8⊙o经过点ab以ab为一边画平行四边形abcd另一边cd经过点o一点b为圆心bc为半径画弧交线段oc于点e．1 coloring

初中数学：不得不说的与圆有关的三角形相似几种形式知乎 sketch template

如图，在四边形ABCD中，对角线AC与BD交于点O，已知OA =OC，OB=OD，过点O作EF⊥ BD，分别交AB、DC于点E，F，连接DE sketch template

题目已知AB是⊙O的直径弦CD⊥AB于点E．1如图�若CD＝8BE＝2求⊙O的半径2如图�点G是上一点AG的延长线与 sketch template

已知：AB是⊙O的直径，弦CD交AB于点E，且．（1）如图1，求证：CE=DE；（2）如图2，连接AC，点F为AC上的一点，连接BF，过点C作 sketch template

如图1已知AB是⊙O的直径弦CD⊥AB于点E点M在⊙O上∠M=∠D1判断BC与MD的位置关系并说明理由2若AE=8BE sketch template

15．如图已知AB是⊙O的直径点C是⊙O上一点连结BCAC过点C作直线CD⊥AB于点D点E是AB上一点直线CE交⊙O于点F连结 sketch template

如图AB是⊙O的直径过圆上一点D作⊙O的切线DE与过点A的直线垂直于E弦BD的延长线与直线AE交于C点．1求证点D为BC的中点 sketch template

题目请完成下面题目的证明．如图AB为⊙O的直径AB=8点C和点D是⊙O上关于直线AB对称的两个点连接OCAC且∠BOC sketch template

题目如图在⊙O中点C在优弧AB上将弧BC沿BC折叠后刚好经过AB的中点D 若⊙O的半径为AB=8则BC的长是 ABC sketch template

如图已知AB是⊙O的直径点C在⊙O上过点C的直线与AB的延长线交于点PAC=PC∠COB=2∠PCB．1求证PC是⊙O的切线 sketch template

题目如图在直角坐标系中已知点A60点B为y轴正半轴上一动点连接AB以AB为一边�下作等边 ABC连接OC则OC的最小值 sketch template

已知：如图，直线：y= 4/3x 4分别交x，y轴于A、B两点以线段AB为直角边在第一象限内作等腰直角 ABC，∠ BAC=90°；直线l sketch template

如图AB是⊙O的直径BC与⊙O相切于点B点D在⊙O上且OD⊥OC1∠ADB=90°理由是直径所对的圆�角是90°2若OA sketch template

已知Rt ABC的斜边AB=8AC=4以点C为圆心作圆当半径R等于时AB与⊙O相切．题目和参考答案——青夏教育精英家教�—— sketch template

如图CD是⊙O的直径CD⊥AB于M已知AB=8MD=2 则⊙O的半径为 ——青夏教育精英家教�—— sketch template

已知：AB是⊙O的直径，弦CD交AB于点E，且．（1）如图1，求证：CE=DE；（2）如图2，连接AC，点F为AC上的一点，连接BF，过点C作 sketch template

【题目�已知：如图，选段AB=4，以AB为直径作半圆O，点C为弧AB的中点，点P为直径AB上一点，联结PC，过点C作CD∥AB，且CD=PC sketch template

如图已知⊙O的直径AB经过弦CD的中点E连接BCBD则下列结论错误的是 A．AB⊥CDB．BC=BDC．∠BCD=∠BDCD．OE sketch template

已知AB为⊙O的直径P为⊙O上任意一点则点P关于AB的对称点P′与⊙O的位置为A在⊙O内B在⊙O外 C在⊙O上 D不能确定——青夏 sketch template

已知 ABC是等边三角形以BC为直径的半圆O与边AB相交于点DDE⊥AC垂足为点E．1判断DE与⊙O的位置关系并证明你的结论2 sketch template

如图已知ab为圆o的直径d是弧bc的中点答案及详细解析过程——青夏教育精英家教�—— sketch template

百度教育 sketch template

1．如图已知⊙O中AB是直径过B点作⊙O的切线BC连结CO．若AD∥OC交⊙O于D．求证CD是⊙O的切线．——青夏教育精英家教�—— sketch template

如图已知AB是⊙O的直径CD是半圆上两点．AB=26AC=101若点D是$widehat{AB}$的中点求AD的长2若点D sketch template

如图已知AB是⊙O的直径点C在⊙O上过点C的直线与AB的延长线交于点PAC=PC∠COB=2∠PCB．1求证PC是⊙O的切线 sketch template

百度教育 sketch template

如图已知Rt ABC中∠ACB=90°BC=6AB=10以BC为直径的⊙O交AB于DACDO的延长线交于E点M为线段AC上一点 sketch template

已知O是线段AB上一点以OB为半径的⊙O交线段AB以点C以线段AO为直径的半圆交⊙O于点D过点B作AB的垂线AD的延长线交于点E连结 sketch template

如图已知AB是⊙O的直径点CD在⊙O上且AB=10AC=8．1如果OE⊥AC垂足为E求OE的长2求tan∠ADC的值 sketch template

如图AB是半圆⊙O的直径点C是半圆上一个动点点D是弧AC的中点延长CD交经过点A的切线于点E连接AD当 ADE是等腰三角形时求∠ sketch template

已知AB切⊙O于点BOA与⊙O交于点C点P在优弧BC上若∠BAC＝40°则∠BPC的度数为 A． 20° B． 25° C sketch template

如图已知ABAC分别为⊙O的直径和弦D为BC的中点DE垂直于AC的延长线于E连接BC若DE=6cmCE=2cm下列结论一定错误 sketch template

如图，已知⊙O是 ABC的外接圆，AB是⊙O的直径，直线CD与⊙O相切于点C，DO∥AC交弦BC于点F，交优弧于点E，连接BD，BE．（1 sketch template

如图已知AB是⊙O的直径⊙O过BC的中点D且DE⊥AC于点E．1求证DE是⊙O的切线2若∠C=30°CE=53求⊙O的 sketch template

已知⊙O的半径为10弦AB的长为103点C在⊙O上且C点到弦AB所在的直线的距离为5则以OABC为顶点的四边形的面积是．题目 sketch template

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