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Academia - Collins - Pocket Scientific Dictionaries - Mathematics - English - French - Arabic - Letter 3_ A


arc
arc m

Arch . An arc is part of a curve.
In the case of a circle in particular, the points A and B define the minor and major arcs of the circle.

For the minor arc AB, it is:
Arc length = 2mrx0 / 360, if 0 is in degrees, or: Arc length = r0 if 0 is in radians.


area
surface f

space . Measure the extent of a surface. We can calculate the areas of some simple shapes easily, as follows:

rectangle
Area = bxh

parallelogram
Area = bxh

trapezoid
Area = a + b/2 x h

Triangle
Area = bxh/2

Circle
Area = πR2


Argand diagram
Diagram m d'Argand

Argand chart. A rectangular Cartesian lattice used in the graphical representation of complex numbers. The complex number 5+2i is represented by a point. (5,2)
The horizontal axis is called the real axis, and the vertical axis is called the imaginary axis.


argument
argument m

Angle (nodal). Independent variable. 1 - The angle of a complex number, which is the angle between the location of the number vector on the Argand diagram and the positive real axis. In the diagram above, we find that the angle of the complex number 5+2i is. ° 21.8

x is the function variable
y = 3x26x-7

f is the function variable
C = (f - 32) x 5/9


arithmetic
arithmetic f

the account . The study of numbers, especially with regard to simple operations, such as addition, subtraction, division, and multiplication, and the applications of these operations in solving problems.

A) Arithmetic mean: It is generally referred to as the average of a group of numbers. The arithmetic mean of n numbers a1a2....an is
(an1 + a2 + a3...an)÷ n

For example: The arithmetic mean of the numbers 5,7,1,8,4 is
(5 + 7 + 1 + 8 + 4) ÷ 5 = 5.

b) Arithmetic progression: A sequence that contains a similar difference between each number and the next number.

For example: 3,7,11,15,19,23 is an arithmetic sequence with a common difference of 4.


associate
association

Collective. Any binary operation that has the property that a*(b*c) = (a*b)*c for all members a, b, and c in a given set is called an aggregate operation.
Multiplying real numbers is an additive operation, such as:
.8x (5 x 2) = (8 x 5) x 2

The division is not aggregate, for example:
80 ÷ (4 ÷ 2) (80 ÷ 4) ÷ 2