Code point
U+25E4
Glyph appearance depends on your fonts.
U+25E4
SoU+25E4 BLACK UPPER LEFT TRIANGLE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25E4
9700
◤
◤
E2 97 A4
25E4
000025E4
%E2%97%A4
\u25E4
\u25E4
\u25E4
\25E4