# Basic math glossary-I

Basic math glossary-I define words beginning with the letter I

Improper fraction: A fraction with a bigger numerator than a denominator.

Infinite: With no end or limit.

Integers: The set of all whole numbers and their opposites.

Intersecting lines: Lines that meet or cross in the same plane.

Invert: In a fraction, it means to switch the position of the numerator with the denominator .

For example, inverting 2/5 gives 5/2

Irrational number: A number that cannot be expressed as a fraction.

For example, square-root(2) and square-root(3) are irrational number because they cannot b written as a fraction.

Isosceles triangles: A triangle that has two equal sides.
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Learn about the quadratic formula, the discriminant, important definitions related to the formula, and applications.