0x221F

0x221F is the hexadecimal notation for the Unicode code point U+221F, which is a mathematical symbol named RIGHT ANGLE. The character is typically rendered as the glyph ∟ and is used in geometry to denote a right angle. It is distinct from the angle symbol ∠ (U+2220).

Unicode and encoding: U+221F belongs to the Mathematical Operators block (U+2200–U+22FF). Its general category is Math Symbol. The glyph’s appearance depends on the font in use. In digital text, 0x221F can be represented in various encodings; in UTF-8 it is encoded as a three-byte sequence. In source code and data, you can refer to it with the Unicode escape \u221F (in languages that support Unicode escapes) or with HTML numeric references such as ∟.

Usage and context: The right angle symbol is commonly used in geometry, trigonometry, and related diagrams to indicate a perpendicular relationship. It may appear in textbooks, technical documents, and software interfaces where geometric notation is required. While the symbol is standard, its exact visual rendering can vary across fonts and environments, with some fonts presenting a small corner shape and others a more pronounced right-angle mark.