ACT数学考试常用词汇大全.docx

ACT数学考试常用词汇大全一、代数部分1.有关基本运算9add，plus加subtract减difference 差multiply,times 乘product 积divide 除divisible可被整除的Divided evenly被整除 divisor 因子，除数quotient商remainder余数factorial 阶乘power 乘方Radical sign,root sign根号Round to/off四舍五入Round to the nearest四舍五入2.有关集合Union并集proper subset 真子集 intersection set 交集solution set 解集3.有关代数式、方程和不等式algebraic term代数项like terms,similar terms同类项numerical coefficient数字系数literal coefficient字母系数inequality不等式triangle inequality三角不等式range 值域original equation原方程equivalent equatio 同解方程 等价方程linear equation 线性方程(e.g.5x+6=22)domain 定义域 4.有关分数和小数proper fraction真分数improper fraction假分数mixed number 带分数numerator 分子denominator 分母(least)common denominator (最小)公分母quarter四分之一infinite decimal无穷小数recurring decimal 循环小数Tens digit 十位Hundreds digit 百位Thousands digit 千位Tenths unit/digit 十分位Hundredths digit 百分位 5.基本数学概念arithmetic mean算术平均值weighted average 加权平均值exponent 指数，幂base 乘幂的底数,底边cube 立方数，立方体square root 平方根cube root立方根digit数字constant常数variable 变量linear一次的，线性的quadratic 二次的 factorization 因式分解absolute value 绝对值，e.g.-32=326.有关数论natural number 自然数(大于等于0的正整数）positive number正数negative number 负数odd integer,odd number奇数even integer,even number偶数integer,whole number整数positive whole number正整数negative whole number负整数consecutive number连续整数real number,rational number 实数,有理数Irrational number无理数reciprocal倒数opposite number 相反数composite number 合数e.g.4,6,8,9,10,12,14,15prime number 质数e.g.2,3,5,7,11,13,15common divisor公约数multiple 倍数(least)common multiple (最小)公倍数(prime)factor(质)因子common factor公因子Ordinary scale,decimal scale 十进制mode众数median中数common ratio公比7.数列arithmetic progression(sequence) 等差数列geometric progression(sequence) 等比数列8.其它Approximate 近似(anti)clockwise(逆)顺时针方向directproportion正比distinct 不同的estimation估计，近似parentheses括号proportion比例permutation排列combination 组合table 表格二、几何部分1.所有的角alternate angle内错角corresponding angle 同位角vertical angle对顶角central angle圆心角interior angle内角exterior angle外角supplement aryangles 补角complement aryangle 余角adjacent angle邻角acute angle 锐角obtuse angle钝角right angle直角round angle周角straight angle平角included angle 夹角2.所有的三角形equilateral triangle等边三角形isosceles triangle 等腰三角形right triangle直角三角形inscribed triangle内接三角形circumscribed triangle外接三角形3.有关收敛的平面图形，除三角形外Semicircle 半圆concentric circles同心圆quadrilateral四边形pentagon五边形hexagon六边形heptagon七边形octagon八边形nonagon九边形decagon十边形polygon多边形parallelogram平行四边形equilateral等边形plane平面square 正方形，平方rectangle长方形regular polygon正多边形rhombus 菱形trapezoid 梯形4.其它平面图形Arc 弧line,straight line 直线line segment 线段parallel lines 平行线5.有关立体图形Cube立方体，立方数rectangular solid长方体regular solid/regular polyhedron 正多面体circular cylinder圆柱体cone圆锥sphere球体solid立体的6.有关图形上的附属物Altitude 高depth 深度side 边长circumference,perimeter周长radian 弧度surface area表面积volume体积Arm/leg直角边Hypotenuse 直角三角形斜边cross section横截面center of a circle圆心chord 弦radius 半径angle bisector角平分线diagonal对角线diameter直径edge 棱face of a solid 立体的面hypotenuse 斜边included side 夹边Median of a triangle 三角形的中线midpoint 中点endpoint 端点vertex(复数形式vertices)顶点tangent 切线的Transversal 截线intercept 截距7.有关坐标coordinate system 坐标系rectangular coordinate 直角坐标系origin原点a