如图,已知平行四边形ABCD中,AB=1/2AD,AB=AE=BF,探索EC与FD的位置关系
EC与FD的360问答位置关系是:互相垂直。异贵证明:设AD与EC的也山未军局较条载表交点为M,BC与FD的交点为服队行这太凯处白费N,连结MN。因为ABCD是平行四边形,所以A...
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如来自图,已知平行四边形ABCD中,AB=1/2AD,AB=AE=BF,探索EC与FD的位置关系,并说明
EC与FD的位置关系是:互相垂直。证明:设AD与EC的交点为M,BC与FD的交点为补**西美扩销N,连结MN。因为ABCD旧春是平行四边形,所以AD//BC,AB//DC,AB=...
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如图,已知平行四边形ABCD中,AB=1/2AD,AB=AE=BF,探索EC与FD的位置关系,并说明理由
EC与FD的位置关系是:互相是垂直。证明:设AD与EC的交点为M,BC与FD的交点为N,连结MN。因为ABCD是平行四边形,所以AD//BC,AB//D洋后C,AB=DC,因为A...
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在梯林米离乐脱际盐*ABCD中,AB∥CD,∠BCD=90°,且AB=1来自,BC=2,tan∠ADC=2.对角线AC和BD相交于点O,等腰直角三角板的直角顶点落在梯*的顶点C上,使三角板绕点C旋转.(1)如图1,当三角板旋转到点E落在BC边上时,线段DE与BF的*置关系是______,数量关系是______;(2)
试题**:(1)的施担垂直,相等.画图如右图(粉调**不唯一)(2)(1)中例结论仍成立.证明如下:过A作AM⊥DC于M,则四边*ABCM为矩*.∴AM=BC=2,MC=AB=1...
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如图①是大众汽车的图标,困室终图②反映其中直线间的关系,并且AC‖BD,AE‖BF。
解:答:∠A=∠B证:∵AC\\BD∴∠A=∠AOB(两直线平行,内错角相等)∵AE\\BF∴∠AOB=∠B(两直线平行,内错角相等)∴∠A=∠B(等量代换)
B,F,E,C在同一直线上,AE⊥BC,DF⊥BC,AB句贵式德怕河赶单长=DC,BF=C超府落爱毛绍们末根E,试判断AB与CD的位置关系,并说明理由
安徽天长老师为你解来自答AE⊥BC,DF⊥BCBF=CE,BE=CF,又AB=CD,所以RT△ABE全等△CDF(HL)∠B=角360问答C,AB∥CD
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colse friend ,pal ,dude,buddy,angel,mate,BF/GF,关系从亲到疏如何排列?
honey,mate,buddy,dude,ange唱裂白措们代学究封木查l,pal,friend,BF/Gf,closefriend,man
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