Приклади вживання Constructible Англійська мовою та їх переклад на Українською
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Due to point A, 0 and 1 are constructible numbers.
Also, any constructible number is an algebraic number.
This can be proven using the field of constructible numbers.
A constructible number is a coordinate of a constructible point.
As an example,the midpoint of constructed segment OA is a constructible point.
Thus, the set of constructible real numbers form a field.
For example, the regular heptadecagon(the seventeen-sided regular polygon) is constructible because.
Thus, for example, cos(π/15) Is constructible because 15 is the product of two Fermat primes, 3 and 5.
However, in order to employ those techniques,it is useful to first associate points with constructible numbers.
Is not constructible, because 7 is not a Fermat prime, nor is 7 the product of 2 k{\displaystyle 2^{k}}.
There is a bijection between the angles that are constructible and the points that are constructible on any constructible circle.
In fact, he did not actually construct the polygon,but rather showed that the cosine of a central angle was a constructible number.
Not all real numbers are constructible and to describe those that are, algebraic techniques are usually employed.
The square root of 2 is equal to the length of the hypotenuse of a right triangle with legs of length 1 andis therefore a constructible number.
If a and b are constructible numbers with b≠ 0, then a± b, a×b, a/b, and√a, for non-negative a, are constructible.
The points of S may now be used to link the geometry and algebra, namely, we define a constructible number is a coordinate of a constructible point.
The angles that are constructible are exactly those whose tangent(or equivalently, sine or cosine) is constructible as a number.
Both trisecting the general angle and doubling the cube require takingcube roots, which are not constructible numbers by compass and straightedge.
The traditional approach to the subject of constructible numbers has been geometric in nature, but this is not the only approach.
To see this, note that the constructed circle C1 with center O and passing through A intersects the constructedcircle C2 with center A and passing through O at the constructible points P and Q.
There is a bijection between the angles that are constructible and the points that are constructible on any constructible circle.
A number is constructible if and only if it can be written using the four basic arithmetic operations and the extraction of square roots but of no higher-order roots.
Now, by introducing cartesian coordinates so that one endpoint of the given unit segment is the origin(0, 0) and the other at(1, 0), it can be shown that the coordinates of the constructible points are constructible numbers.
Furthermore, since 1 is a constructible number, all rational numbers are constructible and ℚ is a(proper) subfield of the field of constructible numbers.
For yet another formulation of this result,this time using the geometric definition of a constructible point,[16] let P be a non-empty set of points in ℝ2 and K the subfield of ℝ generated by all the coordinates of points in P.
A number is constructible if and only if it can be written using the four basic arithmetic operations and the extraction of square roots but of no higher-order roots.
The angles that are constructible form an abelian group under addition modulo 2π(which corresponds to multiplication of the points on the unit circle viewed as complex numbers).
The set of constructible numbers can be completely characterized in the language of field theory: the constructible numbers form the quadratic closure of the rational numbers: the smallest field extension that is closed under square roots.
Since the field of constructible points is closed under square roots, it contains all points that can be obtained by a finite sequence of quadratic extensions of the field of complex numbers with rational coefficients.
In algebraic terms, a number is constructible if and only if it can be obtained using the four basic arithmetic operations and the extraction of square roots, but of no higher-order roots, from constructible numbers, which always include 0 and 1.