GRE数学是我们的中国考生的拿手好戏，考试难度只有高中数学的难度，通常是考G同学们的满分冲刺对象。数学知识点简单，但你会用英语表达吗？高途留学为大家准备了GRE数学专有名词的英文表达汇总之几何。

GRE数学必备词汇—几何

几何 geometry

坐标 coordinate(a : any of a set of numbers used in specifying the location of a point on a line, on a surface, or in space b : any one of a set of variables used in specifying the state of a substance or the motion of a particle or momentum)

横坐标 abscissa(the horizontal coordinate of a point in a plane Cartesian coordinate system obtained by measuring parallel to the x-axis)

纵坐标 ordinate(the Cartesian coordinate obtained by measuring parallel to the y-axis）

解析几何 coordinate geometry

斜率 slope

y轴截距 y-intercept

数轴 number lines

象限 quadrant

角度 degree

锐角 acute(characterized by sharpness or severity ) angle

直角 right angle

钝角 obtuse(not pointed or acute ) angle

顶角 vertex(vertices) angle

平角 straight angle

平分 bisect

角平分线 angle bisector(e that bisects especially : a straight line that bisects an angle or a line segment)

正北方 due(DIRECTLY, EXACTLY) north

长度 lengt

高度 altitude, height

大小，维度 dimension( a (1) : measure in one direction specifically : one of three coordinates determining a position in space or four coordinates determining a position in space and time (2) : one of a group of properties whose number is necessary and sufficient to determine uniquely each element of a system of usually mathematical entities (as an aggregate of points in real or abstract space) <the surface of a sphere has two dimensions> also : a parameter or coordinate variable assigned to such a property <the three dimensions of momentum> (3) : the number of elements in a basis of a vector space b : the quality of spatial extension : MAGNITUDE, SIZE c : a lifelike or realistic quality d : the range over which or the degree to which something extends : SCOPE ― usually used in plural e : one of the elements or factors making up a complete personality or entity : ASPECT)

周长 perimeter(a : the boundary of a closed plane figure b : the length of a perimeter )

面积 area

距离 distance

直线 line

线段 segment(the finite part of a line between two points in the line)

中点 mid point

相交 intersect(to meet and cross at a point )

平行线 parallel lines

垂直线 perpendicular(a : standing at right angles to the plane of the horizon : exactly upright b : being at right angles to a given line or plane) lines

弧 arc(degree measurement on the circumference of a circle ― used especially in the phrase of arc <11 minutes 3 seconds of arc>)

弧度（弧长/半径） radian(a unit of plane angular measurement that is equal to the angle at the center of a circle subtended by an arc whose length equals the radius or approximately 57.3 degrees)

中心 center

圆 circle

圆周长 circumference( the perimeter of a circle )

半径 radius( a line segment extending from the center of a circle or sphere to the circumference or bounding surface )

直径 diameter(the length of a straight line through the center of an object )

内切 inscribe(to draw within a figure so as to touch in as many places as possible )

外接 circumscribe(a : to draw a line around b : to surround by or as if by a boundary )

切线 tangent(meeting a curve or surface in a single point if a sufficiently small interval is considered )

顺时针 clockwise

逆时针 counterclockwise（in a direction opposite to that in which the hands of a clock rotate as viewed from in front）

同心圆 concentric (having a common center)circle

对角线 diagonal( joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face)

三角形 triangle

直角三角形 right triangle

斜边 hypotenuse(the side of a right-angled triangle that is opposite the right angle)

等腰三角形 isosceles(having two equal sides ) triangle

等边三角形 equilateral( having all sides equal ) triangle

三角形的中线 median of a triangle

四边形 quadrilateral(a polygon of four sides)

平行四边形 parallelogram(a quadrilateral with opposite sides parallel and equal)

长方形 rectangle

正方形 square

梯形 trapezoid

五边形 pentagon(a polygon of five angles and five sides)

六边形 hexagon(a polygon of six angles and six sides)

八边形 octagon(a polygon of eight angles and eight sides)

十边形 decagon(a plane polygon of 10 angles and 10 sides)

多边形 polygon

正多边形 regular polygon

全等的 congruent(congruous,being in agreement, harmony, or correspondence)

面 face

边 side

平面 plane

交叠 overlap(to extend over or past and cover a part of )

正方体 cube

长方体 rectangular solid

圆柱 cylinder（the surface traced by a straight line moving parallel to a fixed straight line and intersecting a fixed planar closed curve ）

圆锥 cone

球 sphere

表面积 surface area

体积 volume