# Basic Math Words Beginning with P

Parallel Lines: Two lines in the same plane that never intersect.

Parallelogram: A quadrilateral where both pairs of opposite sides are parallel.

Parentheses: Enclosures for quantities to be grouped together.

Percent: The number of parts per hundred.

Percentage: The result obtained by taking a given percent of the base.

Percent of Change: The ratio of the amount of change to the original amount expressed as a percent.

Percent of Decrease: The percent of change found when the original amount decreases.

Percent of Increase: The percent of change found when the original amount increases.

Perfect Square: A whole number with integer square roots.

Perimeter: The perimeter of a figure is the distance around the figure.

Perpendicular Lines: Lines that inter sect to form right angles.

Pi: The ratio expressed by dividing the circumference of any circle by its diameter.

Place value: The value of the symbol, according to its place in the numeral.

Point: The position of the intersection of two lines. It does not have length, width, or thickness.

Polygon: A plane geometric figure bounded by three or more line segments that join without crossing one another.

Polynomial: An algebraic expression with one or more variables.

Positive Number:  Number greater than zero.

Power:  A power of a number is the product obtained by multiplying the number by itself a given number of times.

Product: The result of the multiplication of the multiplicand and the multiplier.

Prime Factorization: A number written as a product of prime factors.

Prime Number: A natural number bigger than one whose only divisors are I and itself.

Probability: How likely it is that an event will occur.

Proper Fraction: A fraction with a value less than one.

Prime Factorization: The prime factorization of a number is the expression of the number as the product of its prime factor.

Pythagorean Theorem:  In any right triangle, the sum of the squares of the lengths of the legs is equal to the square of the length of the hypotenuse.