初中数学【沪科版】中英文词汇索引

【七年级·上】 次数degree 多项式polynomial 常数项constant term 整式integral expression 代数式的值 value of algebraic expression 同类项like term 合并同类项unite like term 一元一次方程 linear equation with one unknown 一元一次方程组 system of linear equations with one unknown 代入法substitution method 加减法addition-subtraction method 体solid 面surface 线段line segment 射线ray或half line 直线straight line或right line 中点middle point 距离distance 角angle 角的平分线angular bisector 补角supplementary angle 余角complementary angle 抽样调查sampling survey 总体population 个体individual 样本sample 样本容量sample size 简单随机抽样simple random sampling 条形统计图bar statistical chart 折线统计图broken line statistical chart 扇形统计图sector statistical chart 【七年级·下】 平方根square root 被开方数radicand 算术平方根arithmetic square root 开平方extraction of square root 立方根cubic root 根指数radical exponent 开立方extraction of cubic root 无理数irrational number 实数real number 不等式inequality 一元一次不等式 linear inequality in two unknowns 解集solution set 解不等式solving inequality 一元一次不等式组 system of linear inequalities with two unknowns 完全平方公式 formula for the square of the sum 平方差公式 formula for the difference of squares 因式分解factorization,factoring 公因式common factor 分式fraction 分子numerator 分母denominator 有理式rational expression 约分reduction of a fraction 最简分式fraction in lowest terms 通分 reduction of fractions to a common denominator 分式方程fractional equation 【八年级·上】 x轴、横轴x-axis y轴、纵轴y-axis 平面直角坐标系 rectangular coordinate system 自变量independent variable 函数function 待定系数法 method of undetermined coefficient 不等边三角形scalene triangle 等腰三角形isosceles triangle 等边三角形equilateral triangle 锐角三角形acute triangle 直角三角形right triangle 钝角三角形obtuse triangle 角平分线angular bisector 中线median 高线altitude 命题proposition 真命题true proposition 假命题false proposition 反例counter example 定理theorem 证明proof 推论inference 外角exterior angle 全等形congruent figures 全等三角形congruent triangles 轴对称图形symmetric figure 对称轴axis of symmetric 垂直平分线perpendicular bisector 【八年级·下】 二次根式quadratic radical 最简二次根式simplest quadratic radical 一元二次方程 quadratic equation with one unknown 配方法 solving by completing the square 公式法method of formula 因式分解法method of factorization 韦达定理Vieta’s theorem 毕达哥拉斯定理Pythagoras theorem 多边形的对角线diagonal of polygon 平行四边形parallelogram 矩形rectangle 菱形rhombus 正方形square 完美矩形perfect rectangle 完美正方形perfect square 频数frequency 频数分布表frequency distribution table 频率relative frequency 频数直方图frequency histogram 平均数mean 权weight 加权平均数weighted mean 中位数median 众数mode 方差variance 【九年级·上】 二次函数quadratic function 抛物线parabola 反比例inverse proportion 相似多边形similar polygons 相似比similarity ratio 成比例线段proportional segments 黄金分割golden section 正切tangent 正弦sine 余弦cosine 三角函数trigonometric function 仰角angle of elevation 俯角angle of depression 【九年级·下】 旋转rotation 圆circle 圆心center of a circle 半径radius 圆弧arc 弦chord 直径diameter 圆心角central angle 三角形的外接圆circumcircle of triangle 三角形的外心circumcenter of triangle 圆的内接三角形inscribed triangle of circle 圆周角angle in a circular segment 割线secant line 切线tangent line 切点point of tangency 三角形的内切圆inscribed circle of triangle 三角形的内心incenter of triangle 圆的外切三角形 circumscribed triangle of circle 平行投影parallel projection 中心投影center projection 视图view 必然事件certain event 不可能事件impossible event 随机事件random event 概率probability