Sentence examples for by a reflection about from inspiring English sources
For our purposes, we shall transform the right subinterval ([1/2,1]) into the left subinterval ([0,1/2]) by a reflection about (x=1/2).
For instance, the six transformed copies of the triangle in Figure 3 differ from each other by rotations of exactly 120° or 240°, by a reflection about the vertical axis, or a combination of both (each with the appropriate relabelling).
Furthermore, it proposes an analysis of the pedagogical and didactic potential of the tools offered by the Moodle platform and a reflection about the need to use guidelines to evaluate accessibility, also with reference to the Universal Instructional Design principles.
For instance, the equilateral triangle is invariant to rotation by 120°, rotation by 240° and to reflection about three axes (or equivalently, a reflection about one axis combined with the rotations; Figure 2).
The symmetry group contains four symmetry transformations: the identity, a reflection about the vertical axis, rotation by 180° (which is equivalent to two successive reflections about the vertical and horizontal axes), and a combination between reflection and rotation by 180° (which is equivalent to a reflection about the horizontal axis).
Such a more complex decomposition is possible for the example of the alga in Figure 1A, because its symmetry results from a reflection about the horizontal axis and a rotation by 180° (or, equivalently, another reflection about the vertical axis) [ 39].
