أكاديميا - كولنز - معاجم الجيب العلمية - الرياضيات - انكليزي -فرنسي -عربي الحرف ١_ r

Academia - Collins - Pocket Scientific Dictionaries - Mathematics - English - French - Arabic Letter 1_ R

radian
radian m

Radial angle. Radian is an angle at the center of a circle
Its divergence is determined by a minor arc (of the circle) whose length is equal to the radius (radius) of the circle.

The opposite angle is equal to 1 radian

And the radial angle - 57°, and there are 2π or 6.28 (approximately) of radial angles in one circle. And the degree is equal to degree π/180 radial angle.

radius
rayon m

Radius. Ray. The radius (radius) of a circle is the distance between the center of the circle and any point on its circumference.

random
aléatoire

Random. A sample taken from a population is said to be random if each member of the population has an equal chance of being selected.
A random number is a number in which each digit is chosen from a set of values
9 ... 0,1,2,3.4 where each value has the same chance of being chosen.

range
intervalle f

Range 1 - A statistical expression that indicates the difference between the smallest and largest numbers in a set of numbers. For example, for the set: 2,3,4,7,9,10,12,15 the range is
15 -2 =13.

2 - The range of a function is the set of images members of the function's domain. For example: The range of the function 1 + x < 3x with the range (1,2,3,4) is (4,7,10,13).

rank
rangée f

Rank. When a set of numbers or quantities is arranged in ascending order, the position of each element in the list is called its rank. For example:

For the numbers 4, 8, 5, 6, 2, 6, 0, 12
The order of ranks is 0, 2, 4, 5, 6, 6, 8, 12
Rank

ratio
rapport m

Ratio. A method of comparing two quantities measured in similar units by taking the quotient of the two quantities. For example:

The ratio f2 to 500 is written as: 4:1= 200:55

Note: Ratios can be simplified like fractions.

rationalize
rationaliser

Region. The region of an algebraic expression is the elimination of operations in the form √ or √3 ... etc., without changing the value of the expression. For example:

x2-x+2=0 or to x-2=x² it makes sense to √x-2=x x²-7=0 or x²+1=8 it makes sense to √x3 + 1 = 2

In the example below, the denominator of the fraction is:
1/√x+y = √x-y /x- y²

To obtain this result, the numerator of the fraction and its denominator were multiplied by √x-y.

rational number

rational number. Any number that can be expressed in fraction form, i.e. in the form a/b where a and b are whole numbers and b≠0. For example:

The symbol for the set of all rational numbers is Q and all rational numbers can always be written as terminating or recurring decimals.

Numbers that cannot be written as fractions are called irrational numbers.

ray
rayon m

Ray. Half of a ray is a straight line extending from a point called the origin of the ray. Another name for it is half-line.

The above diagram shows three rays starting from a common origin 0.

real numbers
nombres mpl réels

Real numbers. The set of real numbers is the union of the sets of rational and irrational numbers.

For each point on the continuous real number line there is a corresponding real number.

3-2-1- 0 1 2 3 4

-1.5 0.3√2 e π

All of them are real numbers.