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初中数学英语词汇表.txt等余震的心情，就像初恋的少女等情人，既怕他不来，又怕他乱来。听说女人如衣服，兄弟如手足，回想起来，我竟然七手八脚地裸奔了二十多年！今天心情不好，我只有四句话想说，包括这句和前面的两句，我的话说完了！初中数学英语词汇表一般词汇假设hypothesis,hypotheses(pl.)和sum减minus(prep.),subtract(v.),subtraction(n.)被减数minuend减数subtrahend差remainder乘times(prep.),multiply(v.),multiplication(n.)积product除dividedby(prep.),divide(v.),division(n.)被除数dividend除数divisor商quotient等于equals,isequalto,isequivalentto数number自然数naturalnumber整数integer小数decimal小数点decimalpoint分数fraction分子numerator分母denominator比ratio正positive负negative零null,zero,nought,nil单项式monomial多项式polynomial,multinomial系数coefficient等式，方程式equation一次方程simpleequation二次方程quadraticequation三次方程cubicequation不等式inequation阶乘factorial指数，幂exponent乘方power二次方，平方square三次方，立方cuben次方thepowerofn,thenthpower开方evolution,extraction二次方根，平方根squareroot三次方根，立方根cuberootn次方根therootofn,thenthroot函数function定义域domain,fieldofdefinition有理数rationalnumber无理数irrationalnumber实数realnumber虚数imaginarynumber点point线line面plane体solid线段segment射线radial平行parallel相交intersect角angle角度degree弧度radian锐角acuteangle直角rightangle钝角obtuseangle平角straightangle周角perigon底base边side高height三角形triangle锐角三角形acutetriangle直角三角形righttriangle直角边leg斜边hypotenuse勾股定理Pythagoreantheorem钝角三角形obtusetriangle不等边三角形scalenetriangle等腰三角形isoscelestriangle等边三角形equilateraltriangle四边形quadrilateral平行四边形parallelogram矩形rectangle菱形rhomb,rhombus,rhombi(pl.),diamond正方形square梯形trapezoid直角梯形righttrapezoid等腰梯形isoscelestrapezoid五边形pentagon六边形hexagon七边形heptagon八边形octagon九边形enneagon十边形decagon十一边形hendecagon十二边形dodecagon多边形polygon正多边形equilateralpolygon圆circle圆心centre(BrE),center(AmE)半径radius直径diameter弧arc半圆semicircle扇形sector环ring椭圆ellipse圆周circumference周长perimeter面积area相似similar全等congruent多面体polyhedron棱锥pyramid棱柱prism旋转rotation圆锥cone圆柱cylinder球sphere半球hemisphere底面undersurface表面积surfacearea体积volume空间space坐标系coordinates坐标轴x-axis,y-axis,z-axis横坐标x-coordinate纵坐标y-coordinate原点origin双曲线hyperbola抛物线parabola三角trigonometry正弦sine余弦cosine正切tangent余切cotangent正割secant余割cosecant内心incentre(BrE),incenter(AmE)外心excentre(BrE),excenter(AmE)旁心escentre(BrE),escenter(AmE)垂心orthocentre(BrE),orthocenter(AmE)重心barycentre(BrE),barycenter(AmE)内切圆inscribedcircle外切圆circumcircle