初二上數(shù)學寒假作業(yè)答案
練習一:CCACCBDB30,3或44和616:25:088052號
練習二:ACDCCB4,等邊三角形8210560°110°
練習三:CBDCCABB⑷⑹⑺⑴⑵⑶⑸±2/30.69.75×10^105或√7直角10
練習四;BCDDDADB-1/2±3-√5√3-√22.0310035;815(√就是根號。)
練習五:CBCDDCCCC90一、口、王、田經(jīng)過□ABCD的對角線交點AC=BD且AC⊥BD22cm與20cm6345°8
練習六:BCABDACD線段、平行四邊形、正方形、園線段、角、正方形、等腰梯形、圓、等邊三角形線段、正方形、圓90AB=CD80228
練習七:BCAAAA有序實數(shù)對133(-3,-1)=3≠-2(1,2)(1,-3)(-3,-7)
練習八:BCACBC(3,0)(0,1)(-6/7,9/7)y=x+3s=264-24t-2-1y=x-3y=1/3x-1/358240
練習九:CBBDCC-19/2y=3x+51433三y=-x-1一、二、四減小xy8x=2,y=7(自己用大括號)512015
練習十:ADDB9520310188.1993m+73n+7
練習十一:ADBBCDCB2-2325/84(4,-3)y=-5/2xx=-1,y=2(自己用大括號)9±6
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