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Successive rows of turnarounds of discontinuous wefts create a diagonal line which, in pile rugs, is best seen from the back side, and from the front side only if the pile is heavily worn. A lazy line is created when the weaver does not finish a rug line by line from one side to the other, but sequentially finishes one area after the other. [1] [2]
A root-phi rectangle divides into a pair of Kepler triangles (right triangles with edge lengths in geometric progression). The root-φ rectangle is a dynamic rectangle but not a root rectangle. Its diagonal equals φ times the length of the shorter side. If a root-φ rectangle is divided by a diagonal, the result is two congruent Kepler triangles.
The area of the carpet is zero (in standard Lebesgue measure). Proof: Denote as a i the area of iteration i. Then a i + 1 = 8 / 9 a i. So a i = ( 8 / 9 ) i, which tends to 0 as i goes to infinity. The interior of the carpet is empty. Proof: Suppose by contradiction that there is a point P in the interior of the carpet.
It is the ratio of a regular pentagon's diagonal to its side and thus appears in the construction of the dodecahedron and icosahedron. [7] A golden rectangle—that is, a rectangle with an aspect ratio of —may be cut into a square and a smaller rectangle with the same aspect ratio.
A rectangle is a rectilinear polygon: its sides meet at right angles. A rectangle in the plane can be defined by five independent degrees of freedom consisting, for example, of three for position (comprising two of translation and one of rotation), one for shape (aspect ratio), and one for overall size (area).
The diagonals of a cube with side length 1. AC' (shown in blue) is a space diagonal with length , while AC (shown in red) is a face diagonal and has length .. In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge.
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