以 i 开头的数学词汇 | 玄数

2012-10-07
i   虚数单位

icosahedron   二十面体
A regular polygon bounded by 20 equilateral triangle faces, with 12 vertices and 20 edges.

identity   恒等式;同一性
An equation which states that two expressions are equal for all values of any variables that occur. Such as

x2 – y2 = (x + y)(x – y)

imaginary number   虚数
A number of the form a + bi, where i = √-1, a and b are real numbers and b ≠ 0.

Imperial System   英制
Conforming to standards or definitions legally established in Britain: relating to a system of measurement in which weight is measured in pounds, length is measured in feet, and volume is measured in pints.

improper fraction   假分数
An arithmetic fraction whose numerator is greater than or equal to the denominator—for example, 5/3, 4/4.

incenter   内心

inch   英寸

incircle of triangle   三角形的内切圆

included angle   夹角

included side   夹边

increase   增多,提高

independent event   独立事件

index   指数;索引

inequality   不等式

infinite   无限的

infinity   无限

inflation   通货膨胀

inradius   内径

inscribe   刻写

integer   整数

interest   利息

interest rate   利率

interior angle   内角

intersect   相交

intersection   相交

interval   间隔

inverse   逆;对立面;对立面

inverse proportional function   反比例函数
inverse proportional function

inverse operation   逆运算

irrational number   无理数

irregular polygon   不规则多边形

isosceles triangle   等腰三角形