美国数学竞赛AMC12词汇

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1、A　abbreviation简写符号；简写absoluteerror绝对误差absolutevalue绝对值accuracy准确度acuteangle锐角acute-angledtriangle锐角三角形add加addition加法additionformula加法公式additionlaw加法定律additionlaw(ofprobability)（概率）加法定律additiveproperty可加性adjacentangle邻角adjacentside邻边algebra代数algebraic代数的algebraicequation代数方程algebrai

2、cexpression代数式algebraicfraction代数分式；代数分数式algebraicinequality代数不等式algebraicoperation代数运算alternateangle（交）错角alternatesegment交错弓形altitude高；高度；顶垂线；高线ambiguouscase两义情况；二义情况amount本利和；总数analysis分析；解析analyticgeometry解析几何angle角angleatthecentre圆心角angleatthecircumference圆周角anglebetweenalinean

3、daplane直与平面的交角anglebetweentwoplanes两平面的交角anglebisection角平分anglebisector角平分线；分角线angleinthealternatesegment交错弓形的圆周角angleinthesamesegment同弓形内的圆周角angleofdepression俯角angleofelevation仰角angleofgreatestslope最大斜率的角angleofinclination倾斜角angleofintersection相交角；交角angleofrotation旋转角angleofthe

4、sector扇形角anglesumofatriangle三角形内角和anglesatapoint同顶角annum(X%perannum)年（年利率X%）anti-clockwisedirection逆时针方向；返时针方向anti-logarithm逆对数；反对数anti-symmetric反对称apex顶点approach接近；趋近approximatevalue近似值approximation近似；略计；逼近Arabicsystem阿刺伯数字系统arbitrary任意arbitraryconstant任意常数arc弧arclength弧长arc-cosin

5、efunction反余弦函数arc-sinfunction反正弦函数arc-tangentfunction反正切函数area面积arithmetic算术arithmeticmean算术平均；等差中顶；算术中顶arithmeticprogression算术级数；等差级数arithmeticsequence等差序列arithmeticseries等差级数arm边arrow前号ascendingorder递升序ascendingpowersofXX的升幂associativelaw结合律assumedmean假定平均数assumption假定；假设average平

6、均；平均数；平均值averagespeed平均速率axiom公理axis轴axisofparabola拋物线的轴axisofsymmetry对称轴Bbacksubstitution回代barchart棒形图；条线图；条形图；线条图base（1）底；（2）基；基数baseangle底角basearea底面baseline底线basenumber底数；基数baseoflogarithm对数的底bearing方位（角）；角方向（角）bell-shapedcurve钟形图bias偏差；偏倚billion十亿binarynumber二进数binaryoperatio

7、n二元运算binaryscale二进法binarysystem二进制binomial二项式binomialexpression二项式bisect平分；等分bisectionmethod分半法；分半方法bisector等分线；平分线boundarycondition边界条件boundaryline界（线）；边界bounded有界的boundedabove有上界的；上有界的boundedbelow有下界的；下有界的boundedfunction有界函数brace大括号bracket括号breadth阔度brokenlinegraph折线图Ccalculati

8、on计算calculator计算器；计算器cance