Code point
U+29CC
Glyph appearance depends on your fonts.
U+29CC
SmU+29CC S IN TRIANGLE is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Miscellaneous Mathematical Symbols-B block.
Choose the representation you need, then copy its value.
U+29CC
10700
⧌
⧌
E2 A7 8C
29CC
000029CC
%E2%A7%8C
\u29CC
\u29CC
\u29CC
\29CC