以 o 开头的数学词汇 | 玄数

2012-10-07
oblique   倾斜

  • Sloping or joining something at an angle that is not a right angle.
  • Neither perpendicular nor parallel to another line or plane.

oblong   长方形的,矩形的;椭圆形的
Having the shape of or resembling a rectangle or ellipse.

obtuse angle   钝角
An angle greater than 90° and less than 180°.

obtuse triangle   钝角三角形
A triangle with one obtuse angle.

octagon   八边形
A polygon with eight sides and eight angles.

octahedron   八面体
A polyhedron with eight faces.

odd   奇数的

  • Not divisible by two.
  • Changing sign but not absolute value when the sign of the independent variable is changed, as in y = x3.


odd number   奇数
Designating an integer not divisible by two, such as 1, 3, and 5.

odometer   里程表
An instrument that indicates distance traveled by a vehicle.

open sentence   开命题,真伪未定的命题
An expression that contains at least one unknown quantity and becomes true or false when a test value is substituted for the unknown.

operation   运算
A process or action, such as addition, substitution, transposition, or differentiation, performed in a specified sequence and in accordance with specific rules.

operator   运算符
A symbol for expressing a mathematical operation.Such as +, -, ×,÷

order of operations   操作顺序

ordered pair   有序对

ordering   排序;分类

ordinal number   序数词

ordinate   纵坐标

origin   原点

orthocenter   垂心

ounce   盎司

outlier   离群值;异常值

oval   椭圆形