The mathematical constant representing the ratio of a circle's circumference to its diameter, approximately 3.14159.
Pi (π) is an irrational, transcendental number meaning it has infinite non-repeating decimal places. It appears throughout mathematics, physics, and engineering.
π ≈ 3.14159265358979... Common approximations: 22/7 or 355/113 (accurate to 6 decimal places).
A number expressed as a fraction of 100, used to describe proportions and rates of change.
A measure of the spread or dispersion of a data set from its mean (average).
Three measures of central tendency used to describe the center of a data set.
A fundamental relation in geometry: the square of the hypotenuse equals the sum of squares of the other two sides.
Area measures the surface inside a shape (in square units); perimeter measures the distance around it.
A number representing a part of a whole, written as a numerator over a denominator.