Code point
U+25F9
Glyph appearance depends on your fonts.
U+25F9
SmU+25F9 UPPER RIGHT TRIANGLE is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25F9
9721
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E2 97 B9
25F9
000025F9
%E2%97%B9
\u25F9
\u25F9
\u25F9
\25F9