parallel extending in the same direction, equidistant at all points, and never converging or diverging
parallel lines lines that are always equidistant apart, indicated by arrows on the lines to show they are parallel (or double arrows)
pentagon polygon with 5 sides
per annum per year
perfect number a perfect number is a number whose factors, excluding itself, add to the number. For example: 6. the factors of 6 are 1, 2, 3 and 6. Excluding 6 as the factor: 1 + 2 + 3 = 6, hence 6 is a perfect number. Other perfect numbers are: 6, 28, 496, 8128, 3 3550 336…
perpendicular when two lines meet at a right angle, indicated with the symbol: ⊥
perimeter the total length of all the sides
polygon a closed plane shape with 3 or more straight sides. Examples of polygons include: triangle, square, rectangle, pentagon, hexagon
polyhedron a 3-d shape made up of plane faces. Examples:  cube, rectangular prism.
positively skewed The ‘tail’ is being pulled in the positive direction (ie to the right), and the bulk of the distribution is on the left. in formal terms the mode is less than the mean.Positive Skew
prime number a number which has only one set of factors, itself and one. 2 is the first prime number and the only even prime number.
The prime numbers less than 100:  2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 67, 71, 73, 79, 83, 89, 97
Use the Prime Number Calculator to check to see if a number is a prime
principle the original sum of money that has been invested or borrowed
product multiply or times
pronumeral a letter in algebra. eg: 4x + 1  has x as the pronumeral
profit the money made when something is sold for more than was paid for it. Profit = selling price – cost price
Pythagoras Theorem looking for they hypotenuse: c2 = a2 + b2  or use this if looking for one of the shorter side: a2 = c2 – b2
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