Math Glossary: i

i The square root of -1.
Imaginary Number Any positive root of a negative number, as in the fourth root of -3.
Improper Fraction A fraction that has a larger numerator than denominator, like 14/9. Note - this does not mean that the fraction is wrong!
Inequality An expression with two unequal values separated by a less-than or greater-than sign, like 4
Infinite A series or number which has no end and continues forever.
Integer A number in the set of positive and negative whole numbers as well as zero. {...,-2,-1,0,1,2,...}
Isosceles Triangle A triangle which has two congruent sides.