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→?題型突破←→?專題訓(xùn)練←題型一菱形的性質(zhì)判定及其應(yīng)用1.(如圖,四邊形SKIPIF1<0是菱形,點(diǎn)E,F(xiàn)分別在SKIPIF1<0邊上,添加以下條件不能判定SKIPIF1<0的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.如圖,在菱形ABCD中,SKIPIF1<0,SKIPIF1<0,過菱形ABCD的對(duì)稱中心O分別作邊AB,BC的垂線,交各邊于點(diǎn)E,F(xiàn),G,H,則四邊形EFGH的周長(zhǎng)為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.如圖,已知點(diǎn)SKIPIF1<0是菱形SKIPIF1<0的對(duì)角線SKIPIF1<0延長(zhǎng)線上一點(diǎn),過點(diǎn)SKIPIF1<0分別作SKIPIF1<0、SKIPIF1<0延長(zhǎng)線的垂線,垂足分別為點(diǎn)SKIPIF1<0、SKIPIF1<0.若SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.2 D.SKIPIF1<04.如圖,在菱形SKIPIF1<0中,SKIPIF1<0,連接SKIPIF1<0、SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.如圖,菱形SKIPIF1<0的對(duì)角線SKIPIF1<0與SKIPIF1<0相交于點(diǎn)SKIPIF1<0,點(diǎn)SKIPIF1<0在SKIPIF1<0上,連接SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.4 B.3 C.SKIPIF1<0 D.27.如圖,在菱形ABCD中,對(duì)角線AC,BD相交于點(diǎn)O,點(diǎn)E是CD中點(diǎn),連接OE,則下列結(jié)論中不一定正確的是()A.AB=AD B.OESKIPIF1<0AB C.∠DOE=∠DEO D.∠EOD=∠EDO8.如圖,在菱形ABCD中,點(diǎn)E,F(xiàn)分別在AB,CD上,且BE=2AE,DF=2CF,點(diǎn)G,H分別是AC的三等分點(diǎn),則S四邊形EHFG÷S菱形ABCD的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<09.如圖,菱形SKIPIF1<0的對(duì)角線SKIPIF1<0、SKIPIF1<0相交于點(diǎn)O,SKIPIF1<0,垂足為E,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的長(zhǎng)為______.10.菱形SKIPIF1<0中,對(duì)角線SKIPIF1<0,則菱形的高等于___________.11.如圖,在菱形ABCD中,對(duì)角線SKIPIF1<0,SKIPIF1<0,分別以點(diǎn)A,B,C,D為圓心,SKIPIF1<0的長(zhǎng)為半徑畫弧,與該菱形的邊相交,則圖中陰影部分的面積為__________.(結(jié)果保留SKIPIF1<0)12.如圖1,菱形SKIPIF1<0的對(duì)角線SKIPIF1<0與SKIPIF1<0相交于點(diǎn)O,P、Q兩點(diǎn)同時(shí)從O點(diǎn)出發(fā),以1厘米/秒的速度在菱形的對(duì)角線及邊上運(yùn)動(dòng).點(diǎn)P的運(yùn)動(dòng)路線為SKIPIF1<0,點(diǎn)Q的運(yùn)動(dòng)路線為SKIPIF1<0.設(shè)運(yùn)動(dòng)的時(shí)間為x秒,P、Q間的距離為y厘米,y與x的函數(shù)關(guān)系的圖象大致如圖2所示,當(dāng)點(diǎn)P在SKIPIF1<0段上運(yùn)動(dòng)且P、Q兩點(diǎn)間的距離最短時(shí),P、Q兩點(diǎn)的運(yùn)動(dòng)路程之和為__________厘米.13.如圖,在菱形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0為SKIPIF1<0中點(diǎn),點(diǎn)SKIPIF1<0在SKIPIF1<0延長(zhǎng)線上,SKIPIF1<0、SKIPIF1<0分別為SKIPIF1<0、SKIPIF1<0中點(diǎn),SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0_____.14.如圖,四邊形SKIPIF1<0是菱形,點(diǎn)SKIPIF1<0、SKIPIF1<0分別在邊SKIPIF1<0、SKIPIF1<0的延長(zhǎng)線上,且SKIPIF1<0.連接SKIPIF1<0、SKIPIF1<0.求證:SKIPIF1<0.15.如圖,在SKIPIF1<0中,SKIPIF1<0的角平分線交SKIPIF1<0于點(diǎn)D,SKIPIF1<0.(1)試判斷四邊形SKIPIF1<0的形狀,并說明理由;(2)若SKIPIF1<0,且SKIPIF1<0,求四邊形SKIPIF1<0的面積.16.如圖,在平行四邊形ABCD中,對(duì)角線AC與BD相交于點(diǎn)O,過點(diǎn)O的直線EF與BA、DC的延長(zhǎng)線分別交于點(diǎn)E、F.(1)求證:AE=CF;(2)請(qǐng)?jiān)偬砑右粋€(gè)條件,使四邊形BFDE是菱形,并說明理由.題型二矩形的性質(zhì)判定及其應(yīng)用17.如圖,矩形的對(duì)角線,交于點(diǎn),,,過點(diǎn)作,交于點(diǎn),過點(diǎn)作,垂足為,則的值為()A. B. C. D.18.如圖,在矩形ABCD中,AB=5,AD=3,點(diǎn)E為BC上一點(diǎn),把△CDE沿DE翻折,點(diǎn)C恰好落在AB邊上的F處,則CE的長(zhǎng)是()A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<019.如圖,在矩形SKIPIF1<0中,對(duì)角線SKIPIF1<0,SKIPIF1<0相交于點(diǎn)SKIPIF1<0,點(diǎn)SKIPIF1<0,SKIPIF1<0分別是SKIPIF1<0,SKIPIF1<0的中點(diǎn),連接SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的長(zhǎng)是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<020.如圖1,動(dòng)點(diǎn)P從矩形ABCD的頂點(diǎn)A出發(fā),在邊AB,BC上沿A→B→C的方向,以1cm/s的速度勻速運(yùn)動(dòng)到點(diǎn)C,SKIPIF1<0的面積S(cm2)隨運(yùn)動(dòng)時(shí)間t(s)變化的函數(shù)圖象如圖2所示,則AB的長(zhǎng)是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<021.如圖,將矩形紙片ABCD的兩個(gè)直角進(jìn)行折疊,使CB,AD恰好落在對(duì)角線AC上,B′,D′分別是B,D的對(duì)應(yīng)點(diǎn),折痕分別為CF,AE.若AB=4,BC=3,則線段SKIPIF1<0的長(zhǎng)是()A.SKIPIF1<0 B.2 C.SKIPIF1<0 D.122.如圖,在矩形紙片ABCD中,SKIPIF1<0,SKIPIF1<0,M是BC上的點(diǎn),且SKIPIF1<0.將矩形紙片ABCD沿過點(diǎn)M的直線折疊,使點(diǎn)D落在AB上的點(diǎn)P處,點(diǎn)C落在點(diǎn)SKIPIF1<0處,折痕為MN,則線段PA的長(zhǎng)是()
A.4 B.5 C.6 D.SKIPIF1<023.如圖,在矩形SKIPIF1<0中,SKIPIF1<0,點(diǎn)E,F(xiàn)分別在邊SKIPIF1<0上,且SKIPIF1<0,按以下步驟操作:第一步,沿直線SKIPIF1<0翻折,點(diǎn)A的對(duì)應(yīng)點(diǎn)SKIPIF1<0恰好落在對(duì)角線SKIPIF1<0上,點(diǎn)B的對(duì)應(yīng)點(diǎn)為SKIPIF1<0,則線段SKIPIF1<0的長(zhǎng)為_______;第二步,分別在SKIPIF1<0上取點(diǎn)M,N,沿直線SKIPIF1<0繼續(xù)翻折,使點(diǎn)F與點(diǎn)E重合,則線段SKIPIF1<0的長(zhǎng)為_______.24.如圖,矩形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,對(duì)角線SKIPIF1<0的垂直平分線SKIPIF1<0交SKIPIF1<0于點(diǎn)SKIPIF1<0、交SKIPIF1<0于點(diǎn)SKIPIF1<0,則線段SKIPIF1<0的長(zhǎng)為__.25.如圖,在矩形SKIPIF1<0中,E為SKIPIF1<0的中點(diǎn),連接SKIPIF1<0,過點(diǎn)E作SKIPIF1<0的垂線交SKIPIF1<0于點(diǎn)F,交CD的延長(zhǎng)線于點(diǎn)G,連接CF.已知SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0_________.26.如圖,將矩形紙片SKIPIF1<0折疊(SKIPIF1<0),使SKIPIF1<0落在SKIPIF1<0上,SKIPIF1<0為折痕,然后將矩形紙片展開鋪在一個(gè)平面上,E點(diǎn)不動(dòng),將SKIPIF1<0邊折起,使點(diǎn)B落在SKIPIF1<0上的點(diǎn)G處,連接SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的長(zhǎng)為________.27.如圖,點(diǎn)E是矩形ABCD邊AD上一點(diǎn),點(diǎn)F,G,H分別是BE,BC,CE的中點(diǎn),SKIPIF1<0,則GH的長(zhǎng)為________.28.如圖,在矩形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,點(diǎn)SKIPIF1<0從點(diǎn)SKIPIF1<0出發(fā),以SKIPIF1<0的速度沿SKIPIF1<0邊向點(diǎn)SKIPIF1<0運(yùn)動(dòng),到達(dá)點(diǎn)SKIPIF1<0停止,同時(shí),點(diǎn)SKIPIF1<0從點(diǎn)SKIPIF1<0出發(fā),以SKIPIF1<0的速度沿SKIPIF1<0邊向點(diǎn)SKIPIF1<0運(yùn)動(dòng),到達(dá)點(diǎn)SKIPIF1<0停止,規(guī)定其中一個(gè)動(dòng)點(diǎn)停止運(yùn)動(dòng)時(shí),另一個(gè)動(dòng)點(diǎn)也隨之停止運(yùn)動(dòng).當(dāng)SKIPIF1<0為_____時(shí),SKIPIF1<0與SKIPIF1<0全等.29.已知:如圖,矩形SKIPIF1<0的對(duì)角線SKIPIF1<0相交于點(diǎn)O,SKIPIF1<0.(1)求矩形對(duì)角線的長(zhǎng).(2)過O作SKIPIF1<0于點(diǎn)E,連結(jié)BE.記SKIPIF1<0,求SKIPIF1<0的值.30.如圖,點(diǎn)C是SKIPIF1<0的中點(diǎn),四邊形SKIPIF1<0是平行四邊形.(1)求證:四邊形SKIPIF1<0是平行四邊形;(2)如果SKIPIF1<0,求證:四邊形SKIPIF1<0是矩形.31.如圖,在?ABCD中,E為BC的中點(diǎn),連接AE并延長(zhǎng)交DC的延長(zhǎng)線于點(diǎn)F,連接BF,AC,若AD=AF,求證:四邊形ABFC是矩形.32.如圖,在△ABC中,AB=AC,點(diǎn)D、E分別是線段BC、AD的中點(diǎn),過點(diǎn)A作BC的平行線交BE的延長(zhǎng)線于點(diǎn)F,連接CF.(1)求證:△BDE≌△FAE;(2)求證:四邊形ADCF為矩形.33.如圖,菱形ABCD的對(duì)角線AC,BD相交于點(diǎn)O,E是AD的中點(diǎn),點(diǎn)F,G在AB上,EF⊥AB,OG∥EF.(1)求證:四邊形OEFG是矩形;(2)若AD=10,EF=4,求OE和BG的長(zhǎng).題型三正方形的性質(zhì)判定及其應(yīng)用34.如圖,正方形ABCD的對(duì)角線AC,BD交于點(diǎn)O,M是邊AD上一點(diǎn),連接OM,過點(diǎn)O做ON⊥OM,交CD于點(diǎn)N.若四邊形MOND的面積是1,則AB的長(zhǎng)為()A.1 B.SKIPIF1<0 C.2 D.SKIPIF1<035.如圖,在邊長(zhǎng)為3的正方形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的長(zhǎng)是()A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.236.由四個(gè)全等的直角三角形和一個(gè)小正方形組成的大正方形SKIPIF1<0如圖所示.過點(diǎn)SKIPIF1<0作SKIPIF1<0的垂線交小正方形對(duì)角線SKIPIF1<0的延長(zhǎng)線于點(diǎn)SKIPIF1<0,連結(jié)SKIPIF1<0,延長(zhǎng)SKIPIF1<0交SKIPIF1<0于點(diǎn)SKIPIF1<0.若SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<037.如圖,在邊長(zhǎng)為4的正方形ABCD中,點(diǎn)E,F(xiàn)分別在CD,AC上,SKIPIF1<0,SKIPIF1<0,則AF的長(zhǎng)是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<038.如圖,把含30°的直角三角板PMN放置在正方形ABCD中,SKIPIF1<0,直角頂點(diǎn)P在正方形ABCD的對(duì)角線BD上,點(diǎn)M,N分別在AB和CD邊上,MN與BD交于點(diǎn)O,且點(diǎn)O為MN的中點(diǎn),則SKIPIF1<0的度數(shù)為()A.60° B.65° C.75° D.80°39.如圖,矩形AOBC的頂點(diǎn)A、B在坐標(biāo)軸上,點(diǎn)C的坐標(biāo)是(﹣10,8),點(diǎn)D在AC上,將SKIPIF1<0BCD沿BD翻折,點(diǎn)C恰好落在OA邊上點(diǎn)E處,則tan∠DBE等于()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<040.如圖,在正方形ABCD中,SKIPIF1<0,M是AD邊上的一點(diǎn),SKIPIF1<0.將SKIPIF1<0沿BM對(duì)折至SKIPIF1<0,連接DN,則DN的長(zhǎng)是()A.SKIPIF1<0 B.SKIPIF1<0 C.3 D.SKIPIF1<041.如圖,正方形ABCD的邊長(zhǎng)為3,E為BC邊上一點(diǎn),BE=1.將正方形沿GF折疊,使點(diǎn)A恰好與點(diǎn)E重合,連接AF,EF,GE,則四邊形AGEF的面積為()A.2SKIPIF1<0 B.2SKIPIF1<0 C.6 D.542.如圖,在邊長(zhǎng)為2的正方形ABCD中,若將AB繞點(diǎn)A逆時(shí)針旋轉(zhuǎn)SKIPIF1<0,使點(diǎn)B落在點(diǎn)SKIPIF1<0的位置,連接BSKIPIF1<0,過點(diǎn)D作DE⊥SKIPIF1<0,交SKIPIF1<0的延長(zhǎng)線于點(diǎn)E,則SKIPIF1<0的長(zhǎng)為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<043.如圖,正方形OABC的邊長(zhǎng)為2,將正方形OABC繞點(diǎn)O逆時(shí)針旋轉(zhuǎn)角α(0°<α<180°)得到正方形OA′B′C′,連接BC′,當(dāng)點(diǎn)A′恰好落在線段BC′上時(shí),線段BC′的長(zhǎng)度是___.44.已知SKIPIF1<0的三個(gè)頂點(diǎn)都是同一個(gè)正方形的頂點(diǎn),SKIPIF1<0的平分線與線段SKIPIF1<0交于點(diǎn)D.若SKIPIF1<0的一條邊長(zhǎng)為6,則點(diǎn)D到直線SKIPIF1<0的距離為__________.45.如圖,四邊形ABCD是正方形,△ECF為等腰直角三角形,∠ECF=90°,點(diǎn)E在BC上,點(diǎn)F在CD上,N為EF的中點(diǎn),連結(jié)NA,以NA,NF為鄰邊作□ANFG.連結(jié)DG,DN,將Rt△ECF繞點(diǎn)C順時(shí)針方向旋轉(zhuǎn),旋轉(zhuǎn)角為SKIPIF1<0(0°≤SKIPIF1<0≤360°).(1)如圖1,當(dāng)SKIPIF1<0=0°時(shí),DG與DN的關(guān)系為____________________;(2)
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