等腰三角形知识点及典型习题教案模板3( 【每日一练】七年级有理数混合运算100题计算机)

等腰三角形基础练习，七年级，有理数混合运算，100题，乘法，口算，100题，计算机一级题库，二元线性方程，应用题，真心话大冒险，刺激题nbsp一填-填空题1 等腰三角形可以是_______ _三角形________ 三角形_________三角形 nbsp2 等腰三角形底边的_________与顶角的_________重合 nbsp3 如图，已知ABACang1ang2BD5cm，则BC____INCLUDEPICTUREquothttpimg845ph126netKvisPK2IRK11OjbdLXLnHQ300558980△1317941210jpgMERGEFORMATINET4 那么BC____5 ldquo等腰三角形，其两个底角相等rdquo的角是三角形的对边角是______的对角线，那么这个三角形的对角是______的对角线，这个三角形的角是______的对角线是____的对角，那么这个三角形的对角是________ t 的两条中线的交点等边三角形是_________8 给定一个等腰三角形的一个角是75度，那么另外两个角的度数是_________ 9 等腰三角形的周长是35厘米，腰长是底边的两倍，那么腰长是底座长度为_______ 10，如图所示。 ABACangABC 和angACB 的二等分线在F 点相交并与F 点相交，使DE∥BC。那么图中有____个等腰三角形，分别是__________11。如图，△ABC为angACB90degangB30deg，则______AB 若D为AB点的中点，则____为等腰三角形_______为等边三角形 12 如图，△ABC的边ABBC的垂直二等分线DEMN相交在 O 点，则有 OA_____ 如果 OHperpACH 是垂直脚，那么直线 OH 是 AC ____13 如图，已知 ABBCC

DCEangCAE25deg, then angCEN___angMCE_____14 已知等腰三角形的顶角为底角的10倍，腰长为10cm。那么这个三角形的腰高是______15。线段角等腰三角形直角三角形中轴对称图形是________________________二选题 问题1 如图1-4-21所示，已知angABCangC72degBD是△ABC的平分线。然后，在图中的等腰三角形具有nbspnbspnbspnbspnbspnbspnbspA1甲nbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp AangAangBnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp;的双方AangAangBnbspnbspnbspnbspBangAangAangACDnbspnbspnbspnbspCangAangDCBnbspnbspnbspnbspnbspnbspDangA2angBCDnbsp3The长度等腰三角形分别是8厘米和6厘米，所以它的周长是nbspnbspnbspnbspnbsp; 22cmnbspnbspnbspnbspnbspnbsp;

spnbspnbspnbspnbspnbspnbspnbspnbspnbspD是未在图中示出右nbsp4As，已知ABACDE是ABAC的中点，BECD越过GAG的延伸和横穿BC到F.然后在图中全等三角形的数目是nbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp;那么AM就是等腰三角形△ABC的nbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp;A顶角平分线nbspB底角平分线nbspB底角平分线nbspC一腰中线nbspDnbspD底中线6如图中已知△ABC ABACangB50degADAE是D2BACA的延伸然后是△ADE A 等腰三角形 B 等腰三角形 nbspC 等腰直角三角形 D. 以上结论不正确。 7 如图所示，DE为△ABC中AC的垂直平分线。 AE3cm△ABD的周长是13cm，那么△ABC的周长是A115cm

nbspnbspnbspnbspC16cmnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspD19cm8The以下图形不是轴对称图形nbspnbspnbspnbspnbspnbspnbspnbspA等边trianglenbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp）nbspnbspnbspnbspnbspC通过底侧的高度和一个腰部nbspnbspnbspnbspnbspD由一个腰部的高度和另一腰部形成的角度所形成的角度10如果的三个边三角形 abc 满足 a-bb-cc-a0 那么这个三角形是等腰三角形 nbspnbspnbspB 直角三角形 nbspnbspnbspnbspnbspC 等边三角形ngle 11 等腰三角形但不是等边三角形 它的角平分线共有高中心线数

bspnbspB7 件 nbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp;以上长三角形的一边长边都没有等腰三角形的一侧为50度，高度与腰底夹角为50度47 那么这个等腰三角形的腰长是 nbspnbspnbspnbspnbspnbspnbspnbspnbspA35 nbspp nbspp nbspp nbspnbspB2 nbspnbspnbspnbspnbspnbspC352 nbsp nbspnbspnbsp

D 不是真的。 15 满足下列条件的图形为轴对称图形。 A 全等 两个图形 B 可以互相重叠 两个图形 C 沿直线对折 可以互相重叠 两个图形 D 围绕某个点旋转 两个图形 180 度后可以互相重叠。三个计算。证明问题1如图所示。已知△ABC 中ABACangA40degangABC 的平分线与AC 和D 相交。求angADB 和angCDB 的度数。 △ADC为等腰直角三角形CE5cm求AB3的长度如图，CE分为angACBCEperpDBangDABangDBAAC18cm△CDB的周长28cm求DB的长度4如图，ABACangBAD30degADAE求angEDC的度数△ABC 知道△ABC是一个等边三角形。在 ACBC 上取一个 DE 点，使 ADCEAEBD 与 O 相交。求 angBOE 的度数。 △ABC中已知ABACangBAC120degDE垂直平分ACDE2cm求BC的长度7如图，已知△ABC中的ABACang1ang2证明ADperpBCnbsp8等腰三角形知识点及典型习题教案模板3，如图，△ABC为等边三角形，AD为平分线angBAC，ADE为等边三角形，验证BDBEnbsp9等腰三角形知识点及典型习题教案模板3，如图，在△ABC和△DBC中，ang1ang2ang3ang4E是BC上的前一个点。 AD 垂直平分 BCnbsp11，如图所示。已知三角形ABC中的ABAC用ABAC向上做等边三角形△ABD和△ACE来验证DE∥BCnbsp12，如图1-38所示。已知△ABC中，ABACD为AB，E点为AC。延长线上的一点 BDCEDE 到 BC 到 F 来验证 DFEF

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