The single-axis symmetric triangle can hardly be said to
have any meaning in itself; rather, it is a variation of the
multi-axes symmetric, or equilateral, triangle. See
in Group 28.
Like it is seldom seen in prehistoric rock carvings, but see entry in Group 39 for an exception.
Pointed upward it is generally associated with fire and divine power. But as an Egyptian hieroglyph it was, according to Gardiner, an ideogram for thorn, and used when writing such concepts as sharp. In the Hittite hieroglyphic system represented mu, city. In the same system two such signs, , stood for country or kingdom.
We see an example of the law of the polarity of meanings of elementary graphs in the French hobo or gypsy sign system, where rather than signifying something powerful, to be afraid of, means woman or here lives a woman alone.
Compare with in Group 34.