Axis of symmetry

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(Geom.) any line in a plane figure which divides the figure into two such parts that one part, when folded over along the axis, shall coincide with the other part.
(Geom.) See under Axis.

See also: Axis, Symmetry

References in periodicals archive ?
Ask your students to now cut along the axis of symmetry and rotate one right-angled triangle so that its sloping side (hypotenuse) fits along the other sloping side to change the triangle into a rectangle.
5 as well as the points where the line crosses the axis of symmetry.
For this position of the induction coil on the vertical axis of symmetry the macroflows in the lower part of the pool are directed downwards, and those in the upper part of the pool are directed upwards with the formation of a convex section on the surface of molten metal.
A third adhesive portion is located away from the axis of symmetry and is equidistant across the axis of symmetry from the second adhesive portion.
Each of the observed particles may thus be first reoriented and standardized by putting its axis of symmetry in vertical position and by assigning the ordinate y = -1/2 to its lowest point and the ordinate y = 1/2 to its top in the planar case and proceeding analogously with the assignment of the z-values in the spatial case (should this operation admit different realisations we shall choose the one which leads to the largest value of the test statistic to be calculated).
Both interfaces deform first around the axis of symmetry and soon attain nearly parabolic shapes, which in the case of the bubble, turns parallel to the wall for its most part and extends all the way to the tube entrance, whereas in the case of the liquid front, it meets the wall at an axial distance up to about a tube radius from its tip.
The greater size of the eurhythmy room, and the placing of main entrance and stair opposite it in plan, produce a dominant east-west axis, the main axis of symmetry.
In tension, compression, and torsion about the axis of symmetry, most of the strength of a cylindrical structure comes from the walls, not the interior.
In the prevalent longitudinal-church plan, a conventional centre was established along the longitudinal axis of symmetry, a kind of devotional trajectory extended towards the Beyond and, originally, towards the east.
The thermocouples are arranged so that the three junctions lie as closely as possible to the axis of symmetry.