vocabulary Unit4-Unit5.doc

Unit 4 Math （分2周） 一．.数学中常用符号? +:???plus????? x:????multiply? -:???subtract? ?÷:???divide? v~:??square?root? ?|...|:?absolute?value? =:???is?equal?to?? ?=/=:??is?not?equal?to? :???is?greater?than?????? :????is?less?than? //:??is?parallel?to?????? _|_:???is?perpendicular?to? =:??is?greater?than?or?equal?to?(或?no?less?than)? =:??is?less?than?or?equal?to?(或no?more?than)? 二.表达相应数目的前缀? ??1:uni-,mono-? ??2:bi-,du-,di-? ??3:tri-,ter-,? ??4:tetra-,quad-,? ??5:penta-,quint,? ??6:hex-,sex-,? ??7:sept-,hapta-,? ??8:oct,? ??9:enn-,? ??10:dec-,deka-,? 三.数学中常用单词术语? abscissa横坐标? absolute?value绝对值? acute?angle???锐角? adjacent?angle邻角? addition加? algebra?代数? altitude高? angle?bisector角平分线? arc?????弧? area????面积? arithmetic?mean??算术平均值（总和除以总数）? arithmetic?progression??等差数列（等差级数）? arm?????直角三角形的股? at??????总计（乘法）? average?平均值? base????底? be?contained?in??位于...上? bisect??平分? center??圆心? chord???弦? circle??圆形? circumference?圆周长? circumscribe??外切，外接? clockwise?????顺时针方向? closest?approximation???最相近似的? combination???组合? common?divisor公约数，公因子? common?factor?公因子? complementary?angles????余角（二角和为90度）? composite?number?合数（可被除1及本身以外其它的数整除）? concentric?circle同心圆? cone????圆锥（体积＝1/3*pi*r*r*h）? congruent?????全等的? consecutive?integer?????连续的整数? coordinate????坐标的? cost????成本? counterclockwise?逆时针方向? cube????1.立方数??? 2.立方体（体积＝a*a*a??表面积＝6*a*a）? cylinder圆柱体? decagon?十边形? decimal?小数? decimal?point?小数点? decreased?????减少? decrease?to???减少到? decrease?by???减少了? degree??角度? define??1.定义??2.化简? denominator???分母? denote??代表，表示? depreciation??折旧? distance距离? distinct不同的? dividend1.?被除数??2.红利? divided?evenly被除数? divisible?????可整除的? division1.除??2.部分? divisor?除数? down?payment??预付款，定金? equation?方程? equilateral?triangle????等边三角形? even?number???偶数? expression????表达? exterior?angle外角? face???（立体图形的）某一面? factor?因子? fraction1.分数??2.比例? geometric?mean几何平均值（n个数的乘积再开n次方）? geometric?progression???等比数列（等比级数）? have?left?????剩余? height??