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A-level数学词汇分类整理——几何与三角篇最后一波，A-level数学几何与三角篇来袭~~【几何与三角篇】acute(obtuse)angle锐（钝）角adjacent邻边adjacentangle邻角alternateangle内错角altitude高amplitude振幅angle角、角度arclength弧长area面积argument辐角ball球体bisector平分线centre中心centralangle圆心角centroid形心、质心chart图chord弦circle圆circularcone圆锥circularcylinder圆柱体circularring圆环circularsector圆扇形circumferentialangle圆周角circumference周长compass圆规complementaryangle余角concentriccircles同心圆congruence全等congruenttriangle全等三角形coniccurve圆锥曲线correspondingangle同位角cosecant余割cotangent余切curve曲线decagon十边形diagonal对角线diagram图、图表diameter直径directrix准线disc圆盘distance距离dodecagon十二边形doubleangleformula倍角公式eccentricity离心率ellipse椭圆ellipsoid椭球equilateraltriangle等边三角形exteriorangle外角focalpoint焦点focus焦点hemisphere半球heptagon七边形hexagon六边形horizontalline水平线hyperbola双曲线hyperboloid双曲面hypotenuse斜边inclinationangle倾角includedangle夹角innercentre内心inscribedcircle内切圆interiorangle内角internalbisector角平分线intersectionpoint交点isogonal等角的isoscelestrapezoid等腰梯形isoscelestriangle等腰三角形lineofsymmetry对称线linesegment线段lozenge,rhombus菱形major(minor)axis长（短）轴medianline中线medianpoint重心、中点n-gonn-边形nonagon九边形normalline法线obliqueline斜线octagon八边形opposite对边parabola抛物线paraboloid抛物面parallellines平行线parallelogram平行四边形pentagon五边形perimeter圆周长period周期periodicfunction周期函数perpendicularline垂直线plane平面point点polygon多边形polyhedron多面体prism棱柱pyramid棱锥Pythagoreantheorem勾股定理quadrant象限quadrilateral,quadrangle四边形radian弧度radius半径ray射线rectangular长方形regularpolygon正多边形righttriangle直角三角形ruler直尺secant正割sector扇形similarfigure相似形similarity,similarto相似solidgeometry立体几何sphere球面square正方形straightline直线subscribedcircle外接圆supplementaryangle补角surface曲面tangent正切tangentline切线terminalpoint终点tetrahedron四面体torus环面trapezoid,trapezium梯形triangle三角形trigonometricfunction三角函数trigonometry三角学vertexangle顶角verticalangles对顶角verticalline垂直线volume体积想要更多精彩内容，继续关注索引留学吧~~