ABCD is a rhombus where A=(-3,0),B=(0,4),C=(5,4) and D=(2,0) Prove that the diagonals are perpendicular bisectors of on another.网上是这样说的：.因为ABCD is a rhombus[ABCD是菱形],所以the diagonals are perpendicular bisectors of on anot

ABCD is a rhombus where A=(-3,0),B=(0,4),C=(5,4) and D=(2,0) Prove that the diagonals are perpendicular bisectors of on another.网上是这样说的：.因为ABCD is a rhombus[ABCD是菱形],所以the diagonals are perpendicular bisectors of on anot 2道英语数学题1.ABCD is a rhombus where A=(-3,0),B=(0,4),C=(5,4) and D=(2,0) Prove that the diagonals are perpendicular bisectors of on another.2.Prove that the point (-1,2genhao2),(genhao3,-genhao6)and (-genhao5,2) all lie on a circle with cent When is a rhombus a square?什么意思还有几个： 1.When is a parallelogram a rectangle? 2.When is a parallelogram a square? 3.When are the properties of a rhombus? 4.How do you find the area of a quadrilateral? 知道的来,不知道就别乱 一道gre数学题目A rhombus has a base of 10 and a height of 4the area of the rhombus的数值大还是the perimeter of the rhombus的数值大,谢谢,我不知道怎么算也 Yesterday is history,Tomorrow is a mystery,But today is a gift.That is wh (1/2)All (what) is needed is a cup of water.A.the thing B.that C.wh non-square rhombus non-square rectangle isosceles My Pet I like animals,so I keep a cat as a pet.He is black white.He is very lovely.Every morning wh 从下列各组单词中选出画括号部分读音与例词相同的一个.1.sn(ow).A:n(ow);B:b(oa)t;C:fl(ow)er.2.(pl)ate.A:(pl)ace;B:(pr)ide;C:(pr)ay.3.(th)is.A:(th)in;B:ma(th);C:clo(th)es.4.(wh)ole.A:(wh)ose;B:(wh)ale;C:(wh)ite.5.sh(ir)t.A:doct(or （）1.Wh( ) come in and have a look A.can’t B.don’t C（）1.Wh( ) come in and have a look A.can’t B.don’t C.not （）2.Is there a computer in your study?( )A.Yes ,it is B.Yes ,there is C.No.I am not .（）3.There ( ) much water in the gl some times it is not completely appreciated wh在线翻译 where is the dog (wh-word+verb+subject) ——countries is the computer sold? A 是whose B是which C是 In where D是in wh 英语选择Who is that has made Mike ____he is now?A.wh英语选择Who is that has made Mike ____he is now?A.who.B.that.C.what.D.whom 跪求速度!I work in a business_________almost everyone is waiting for a great chance.I work in a business_________almost everyone is waiting for a great chance.A.how B.whichC.wh 写处于括号部分读音相同的单词1.（wh)y ( ) ( ) ( ) ( ) ( )2. (wh)o ( ) ( ) ( ) ( ) ( )3. (th)in( ) ( ) ( ) ( ) ( )4. (th)is( ) ( ) ( ) ( ) ( ) 英语2题单选1. Would you like cup of tea, please?A. some B. any C.another D. some more 2. There is a red car parking in ourneighborhood. Do you know it is? A. what B. wh 四棱锥P-ABCD的三视图如右图所示,当a=2时,则该四棱锥的表面积http://d.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=e3ecf31431adcbef016176009c9f02e5/a1ec08fa513d26976aa0c28d55fbb2fb4216d8eb.jpg