FirstPoint MedInfo responds to inquiries with a consistent, accurate and timely message. Learn More註解 DaveDev FCG announces Firstpoint for SharePoint | Weak Bladder 2009年6月7日 PingBack from http://weakbladder.info/story.php?id=4256 ...
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百度试题 结果1 题目E F -∴∠FCG=∠ACG=60° ∴PE∥1/2A F =4,CE =2,点O为BC中点,点M为DE中点,求OM的长AM D D M EB下二 相关知识点: 试题来源: 解析 √7 反馈 收藏
B AC F(G D E如图, AB∥DE , FC⊥C D 于点C,∠ABC =107°,∠CDE =130°,点 G在BC的延长线上,则∠FCG的度数是 相关知识点: 试题来源: 解析 B A C F一 G D E 33° 【解析】如答图,过点C作 CH∥AB , ∴∠GCH=∠ABC=107° , ∴∠HCD+∠CDE=180° , ∴∠HCD=180°-130°=...
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F GM CB EN0D A如图,某小区为美化环境,建设美丽家园,计划在一块半径为R(R为常数)的扇形区域上,建个矩形的花坛CDEF和一个三角形的水池FCG.其中GC=GF,O为圆心,∠AOB=120°,C,G,F在扇形圆弧上,D,E分别在半径OA,OB上,记OG与CF,DE分别交于M,N,∠GOC=θ.(1)求△FCG的面积S关于θ的关系式,并写出定...
[例3](教材提升 ·例10)如图,某小区为美化环境,建设美丽家园,计划在一块半径为R(R为常数)的扇形区域上,建个矩形的花坛CDEF和一个三角形的水池FCG.其中GC =GF,O为圆心,∠AOB =120°,C,G,F在扇形圆弧上,D,E分别在半径OA,OB上,记 OG与CF ,DE分别交于M,N, ∠GOC=θ .(1)求△FCG的面积S关于θ的...
AEB1FCGD2H 相关知识点: 试题来源: 解析 证明:∵∠BEG=∠DGN,∴AB∥CD,∴∠MEA=∠EGC,∵∠1=∠2,∴∠MEA+∠1=∠EGC+∠2,∴∠MEF=∠EGH,∴EF∥GH. 结果一 题目 如图,已知$\angle AEM=\angle DGN$,$\angle 1=\angle 2$,试问EF是否平行GH,并说明理由.MAEBLFGC2DH1 答案 方法一:$EG\parallel ...
解析 证明:连接OF,FC,OG. E为OC的中点, AB⊥CD , FG∥AB , ∴FG⊥CD . ∴FC=FO x:FO=CO , ∴△FCO 为等边三角形. ∴∠FOC=60° . ∴∠AOF=30° ,AF的度数为30°. 同理:∠COG =60°. ∴∠FOG=120° . ∴FCG的度数为120°. FCG=4 AF. ...