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        1. 2012•|I(yng)ij@21ͬW(xu)±
          /cm 180 185 187 190 201
          ˔(sh)/ 4 6 5 4 2
          tԓ@21ͬW(xu)ߵλ(sh)
          187
          187
          cm
          λ(sh)Ҫє(sh)(j)Сλgһ(g)(sh)ɂ(g)(sh)ƽ(sh)λ(sh)
          ⣺С11(g)(sh)187cmλ(sh)ǣ187cm
          ʴ𰸞飺187
          c(din)u(png)}y(tng)Ӌ(j)}λ(sh)xλ(sh)njһM(sh)(j)С󣨻ĴСкgǂ(g)(sh)gɂ(g)(sh)ƽ(sh)@M(sh)(j)λ(sh)λ(sh)ĸյòãє(sh)(j)Ҫ͕(hu)e(cu)
          (x)(c)ϵд
          P(gun)(x)}

          ĿД(sh)W(xu) (li)Դ

          2012•|I(yng)ijʩذһ(g)AˮͰľ֧ܣD1Ӌ(j)ľlĺ丩ҕDD2ʾ֪ADֱƽBCAD=BC=48cmtAˮͰĵ돽ֵ
          30
          30
          cm

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          2012•|I(yng)ijУW(xu)(hu)ɲ(du)УW(xu)(hu)(do)ġԸ(dng)M(jn)г{(dio)õһMW(xu)rĔ(sh)(j)(du)W(xu)У־˔(sh)M(jn){(dio)ͷֽMy(tng)Ӌ(j)(sh)(j)DʾĽy(tng)Ӌ(j)DDϢ ֪ABɽM˔(sh)ıȞ15
            ˔(sh)ֽMy(tng)Ӌ(j)
          Me ~x/Ԫ ˔(sh)
          A 1x10 a
          B 10x20 100
          C 20x30
          D 30x40
          E x40
          Ո(qng)Y(ji)ϢІ(wn)}
          1a=
          20
          20
          {(dio)ӱ
          500
          500
          
          2CM˔(sh)a(b)ȫ˔(sh)ֽMy(tng)Ӌ(j)D1
          31W(xu)M(jn){(dio)ǡǾ(sh)30ԪĸǶ

          鿴𰸺ͽ>>

          ĿД(sh)W(xu) (li)Դ

          2012•|I(yng)Dij9r(sh)(yng)̖(ho)݆λA̎^y(c)ijۿڳPλ݆ıƫ67.5݆21/r(sh)ٶ2r(sh)ԓ_(d)B̎@r(sh)^
          y(c)Pλԓƫ36.9㷽˕r(sh)݆̎λBcPľx(sh)(j)sin36.9
          3
          5
          tan36.9
          3
          4
          sin67.5
          12
          13
          tan67.5
          12
          5

          鿴𰸺ͽ>>

          ͬ(x)(c)