A-level数学词汇分类整理——几何与三角篇.docx

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adjacent angle邻角alternate angle内错角altitude高amplitude振幅angle角、角度arc length弧长area面积argument辐角ball球体bisector平分线centre中心central angle圆心角centroid形心、质心chart图chord弦circle圆circular cone圆锥circular cylinder圆柱体circular ring圆环circular sector圆扇形circumferential angle圆周角circumference周长compass圆规complementary angle余角concentric circles同心圆congruence全等congruent triangle全等三角形conic curve圆锥曲线corresponding angle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double angle formula倍角公式eccentricity离心率ellipse椭圆ellipsoid椭球equilateral triangle等边三角形exterior angle外角focal point焦点focus焦点hemisphere半球heptagon七边形hexagon六边形horizontal line水平线hyperbola双曲线hyperboloid双曲面hypotenuse斜边inclination angle倾角included angle夹角inner centre内心inscribed circle内切圆interior angle内角internal bisector角平分线intersection point交点isogonal等角的isosceles trapezoid等腰梯形isosceles triangle等腰三角形line of symmetry对称线line segment线段lozenge, rhombus菱形major (minor) axis长（短）轴median line中线median point重心、中点n-gon n-边形nonagon九边形normal line法线oblique line斜线octagon八边形opposite对边parabola抛物线paraboloid抛物面parallel lines平行线parallelogram平行四边形pentagon五边形perimeter圆周长period周期periodic function周期函数perpendicular line垂直线plane平面point点polygon多边形polyhedron多面体prism棱柱pyramid棱锥Pythagorean theorem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regular polygon正多边形right triangle直角三角形ruler直尺secant正割sector扇形similar figure相似形similarity, similar to相似solid geometry立体几何sphere球面square正方形straight line直线subscribed circle外接圆supplementary angle补角surface曲面tangent正切tangent line切线terminal point终点tetrahedron四面体torus环面trapezoid, trapezium梯形triangle三角形trigonometric function三