3.76.53.5简便计算

1234567891的平方减去1234567890乘1234567892等于多少 1234567890-987654321的差有什么特点 (1234567890＋987654321）乘123456789987654321 1234567890是1234567890吗 如图,△ABC中,∠BAC=90°,正方形的一边GF在BC上,其余两个顶点分别在AB,AC上.连接AG,AF分别交D,E于M,N两点.⑴求证：DM/BG=MN/GF.⑵求证：MN·MN=DM·EN.⑶若AB=AC=2,求MN的长. 以我的初中生活为话题的英语作文80字左右.写得比较贴合实际,像自己写的就行 80单词英语作文1. 你最喜欢的电视节目是什么?2. 你喜欢它的理由是什么?3. 作出结论.4. 顺便给出中文翻译.没什么哈,我在读电大本科.考试作为只要求80个单词左右. 等腰RT△ABC中,∠C=90°,正方形DEFG的定点D在AC边上,点E,F在AB边上,点G在BC边上,求证AE=bf RT三角形ABC,角C=90度,正方形DEFG内接于三角形ABC,AE=4,BF=9则正方形DEFG面积是 如图,已知：等腰Rt△OAB中,∠AOB=90°等腰Rt△EOF中,∠EOF=90°连接AE,BF求证：（1）AE=BF （2)AE⊥BF 如图 已知等腰RT△AOB中 ∠AOB=90° 等腰RT△EOF中 ∠EOF=90° 连结AE BF 求证：①AE=BF ②AE⊥BF 123456789/（123456789*123456789-1234567890*1234567892） 一篇英语文章（缺词填空,首字母已给）各位帮帮忙,想一想in the universe,there is the Earth,the moon,the sun,the stars and all o____ things too far away to see.the Earth is one of the sun's planets,and the moon is our satellite.th 1234567890相加是21点的五位数的所有排列 短文缺词填空,八年级英语,谢谢 在三角形ABC中 角A=90度 AB=AC 点D E F分别在AB AC BC上 AD=AE CD垂直平分EF 求证 BF=2AD 34508.9万等于多少亿 英语短文填空,每空一词.While most kids were playing iPad games ___ going out with friends ,___ boy Dean Miller was helping out at fire department in Ohio.Dean is 14 years old.He ___ to help in every way he can.He went out on calls with the f 等腰直角三角形ABC中,AC=BC=1cm,等腰直角三角形DEF的顶点D为AB的中点（1)DE垂直AC于M,BC垂直DF于N,则DM与DN在数量上有什么关系?2个三角形重叠部分面积是多少? （2)如图2,将三角形DEF绕着点D旋转一 4 个9 怎样列式结果能等于1 0 0 0+9=?零加9等于? 初二英语（短文填空,一空一词）Once Einstein was waiting for one of his friends.While he was waiting,he became in deep _____.It began to rain.The rain kept on for some time.When he ______out a piece of paper from his pocket to write somet 短文填空,每空一词My grandfather never watched TV .He thought that people spent too much time ( ) it.Some of his friends ( ) talked about sports shows,the movies and plays.Mygrandfather said to himself,"They never read( )books or go out in the 用9,4,5,0,0,7,3,2这八个数来写数,约等于4700万的最大八位数 如图△ABC和△DEF是两个全等的等腰直角三角形,∠BAC=∠EDF=90°,△DEF的顶点E与△ABC的斜边BC的中点重合将△DEF绕点E旋转,旋转过程中,线段DE与线段AB相交于点P,线段EF与射线CA相交于点Q.如图①,当 两块等腰直角三角形的三角板如图放置.将△ABC固定不动,△DEF的直角顶点D放在△ABC的斜边的中点O处,且绕点O旋转过程中,两直角边的交点G,H始终在边AB,CB上（1）在旋转过程中,BG和CH有何大小关 把两块全等的直角三角形ABC和DEF叠放在一起,使三角板DEF的锐角顶点D与三角板ABC的斜边中点O重合,其中∠ABC=∠DEF=90°,∠C=∠F=45°,AB=DE=4,把三角板ABC固定不动,让三角板DEF绕点O旋转,设射线DE与射 初一英语短文缺词填空 7个4加起来等于100怎么加? 如图,△ABC和△DEF是两个全等的等腰直角三角形,∠BAC=∠EDF=90°,△DEF的顶点E与△ABC的斜边BC的中点重合．将△DEF绕点E旋转,旋转过程中,线段DE与线段AB相交于点P,线段EF与射线CA相交于点Q．(1)如 英语短文缺词填空2.Did you enjoy the trip from the b____. 数学问题增长率可以超过100%或等于100%吗?