SYMMETRY
Etymology:
Latin symmetria, from Greek, from symmetros symmetrical,
from
syn- + metron measure -- more at MEASURE
1
: balanced proportions; also : beauty of form arising from balanced proportions
2
: the property of being symmetrical; especially : correspondence in size,
shape, and relative position of parts on opposite sides of a dividing line
or median plane or about a center or axis
3
: the property of remaining invariant under certain changes (as of orientation
in space, of the sign of the electric charge, of parity, or of the direction
of time flow) -- used of physical phenomena and of equations describing
them
TESSELLATION
1
a : MOSAIC b : a covering of an infinite geometric plane without gaps or
overlaps by congruent plane figures of one type or a few types
Symmetry
is detected when a shape has been moved and its shape retained. There are
four ways to describe the symmetry of a pair/number of the same shape.
These
are Rotation,
Reflection,
Glide Reflection,
and Translation.
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