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I equals 1 in Roman numerals.
i is an imaginary number, defined as the square root of negative one.
An icosahedron is a twenty-sided geometric solid.
identity for addition
The additive identity is the number zero because zero plus any number is equal to the original number. For example,
identity for multiplication
The identity for multiplication (also called the multiplicative identity) is one, because a times 1 = 1 times a = a. For example, 2 times 1 = 1 times 2 = 2.
An illusion is something that tricks your eyes.
An imaginary number is a number of the form bi, where i is the square root of negative one and b is a real number.
An improper fraction is one whose numerator is larger than the denominator (like 5/4). Improper fractions can be written as a mixed number, a number plus a fraction (5/4 = 1 1/4).
An inch is a unit of measurement that is equal to one-twelfth of a foot. The symbol for inch is ".
An inequality is a mathematical expression that contains an inequality symbol. The inequality symbols are :
< less than (1<2)
Infinity is a concept of endlessness. The symbol above represents infinity.
The integers are the numbers ..., -3, -2, -1, 0, 1, 2, ....
An intersection is where two or more things, like roads or sets, meet or overlap. The intersection of two sets is the set of objects that belong to both of the original sets.
inverse property of addition
The inverse property of addition states that for every number a, a + (-a) = 0 (zero).
inverse property of multiplication
The inverse property of multiplication states that for every non-zero number a, a times (1/a) = 1.
An irrational number is a number that cannot be written as a fraction (like a/b, where a and b are whole numbers and b is ≠ 0). For example, the square root of 2 is an irrational number.
An isosceles triangle has two sides that are the same length and two angles that are the same.
Click on an underlined word for more information on that subject. If the math term you are looking for is not in the dictionary, please e-mail us.
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