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percentile
percentile m

Percentile. The range of a frequency distribution is divided into 100 parts by percentiles. 15 percent of the data falls below the 15th percentile, 40 percent falls below the 40th percentile... and so on...

The median value of the distribution is at the 50th percentile.

perfect
parfait

perfect. A perfect number is a number equal to the sum of its factors (except the number itself). For example:

28=1+2+4+7+14
6=1+2+3
The third perfect number is 496.

perimeter
perimètre m

perimeter. The perimeter of a shape is the distance measured around its boundary.

The perimeter of this triangle is 12 units (3+4+5)

The perimeter of this shape is 20 units (4+2+6+4+2+2)
The circumference of a circle is also known as circumference.

period
period f

Period. The graph sinx = y repeats itself every 360°. This value 360°, is the period of the function, and y=sinx is said to be a periodic function.

y=tanx
°has a period of 180°
y=cosx
also has a period of 360°
y-sin x

y=sin 3x
has a period of 120°

y=cos °24x
has a period of 15

permutation
permutation f

Permutation. Permutation is an organized arrangement of a set of
numbers.

For example: All possible permutations of the numbers 1,2,3 are: 1,2,3,12,13,23,21,41,32,123,231,213,312,321.

There are n! (n factorial) permutations of n numbers that are all taken at the same time.

For example: for one number one permutation

for two numbers two permutations

for 3 numbers 6 permutations

for 4 numbers 24 permutations

and there are (nl/(n-r) permutations for n numbers taken r every
time .

perpendicular
perpendiculaire

perpendicular. Two straight lines are said to be perpendicular, or that one of them is perpendicular to the other, when they meet at right angles.

Two planes may also be perpendicular. A line perpendicular to a plane is normal to the plane.

pi
pi

Pi. The symbol pi (π) is used to indicate a ratio or 22/7 as an approximate value for pi.

π = C/D

and π is an irrational number

3.1415926535= π

but we usually use 3.14 or 22/7 As an approximate value for pi. π is used to calculate the lengths, areas, and volumes of circular solids. For example:

The area of ​​a circle with radius R is πR2.

The volume of a cylinder is πR2h.

The volume of a sphere is πR3 × 4/3

pictogram
pictogramme

Pictograms. Pictograms are a way of representing

statistical information, usually in the form of a picture.

Pictograms represent the number of vehicles passing a control point per minute.

(5) Car

(2) Bus

(3) Truck

(2). Bicycle