Right angle (∟) is the Unicode character at U+221F in the Mathematical Operators block. Official name: RIGHT ANGLE. It marks a 90° corner in geometry and mathematical notation.
Remember
Character ∟
Unicode U+221F
Named entity ∟
Hex entity ∟
Decimal ∟
CSS escape \221F
Not the same ∠ · ⊾ · °
Prefer ∟ in HTML markup. You can also type ∟ in UTF-8, or use numeric forms when needed.
Right Angle using Named Entity: ∟
Right Angle using Hex Code: ∟
Right Angle using HTML Code: ∟
Right Angle using CSS Entity: ∟
Typed directly: ∟
Geometry: ∟ = 90°
How It Works
1. Named:∟ is the HTML5 name for U+221F → ∟. Best default in markup.
2. Hex:U+221F → ∟ in HTML. Same glyph as the named form.
3. Decimal: same code point as 8735 → ∟. Same result as hex and named.
4. CSS: use \221F in content (not an HTML entity). #point::after appends that ∟ after the paragraph text.
5. Typed / geometry: paste ∟ in UTF-8, or write ∟ = 90° for a clear 90° label.
Pitfalls & Tips
Common mistakes when working with the right angle symbol.
vs ∠
Not a general angle
∟ is ∟ (90°). ∠ is ∠ — a generic angle mark.
°
Degrees are different
Write 90° for the measure. Use ∟ for the corner glyph itself.
⊾
Arc form is separate
Right angle with arc (⊾, U+22BE) is not ∟. See right angle arc.
CSS vs HTML
Do not mix escapes
\221F belongs in CSS strings. ∟ / ∟ / ∟ belong in HTML.
Semicolon
End named entities
Always finish with ; — write ∟, not &angrt.
Fonts
Math glyph coverage
Some fonts render ∟ poorly. Prefer fonts with Mathematical Operators coverage for print-quality pages.
Compatibility
Browser Support
Right angle (U+221F) and its entity forms (∟, ∟, ∟, CSS \\221F) are supported in all mainstream browsers. Visible glyphs depend on math font coverage.
✓ Universal support
Right Angle (∟)
Encode with named, hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+221F / entitiesFull support
Bottom line: Prefer ∟ in HTML. Use ∟ / ∟ when numeric form is required, and \\221F only inside CSS content.
Remember
Key Takeaways
Unicode: right angle is U+221F (decimal 8735) — glyph ∟.
HTML: prefer ∟ — also ∟ / ∟ / type ∟.
CSS: use \221F inside content for generated text.
Meaning:∟ = 90° corner — not ∠, not °, not ⊾.
Use ∟ (named), ∟ (hex), ∟ (decimal), type ∟ directly in UTF-8, or the CSS escape \221F in content. Prefer ∟ in normal HTML.
U+221F (RIGHT ANGLE). Hex 221F, decimal 8735. It belongs to the Mathematical Operators block (U+2200–U+22FF).
Yes. Use ∟. Numeric forms ∟ and ∟ also work.
No. ∟ is U+221F (right angle, ∟). ∠ is U+2220 (angle, ∠) — a general angle mark, not specifically 90°.
Use it in geometry, math notes, and technical docs when you need a 90° corner mark. Prefer ∠ for a generic angle, and right-angle-arc for the arc form.
HTML entities (∟, ∟, or ∟) go in markup. The CSS escape \221F goes in stylesheet strings (usually content on ::before/::after).
🤔
Did you know?
Right angle is Unicode U+221F (decimal 8735) — glyph ∟ in the Mathematical Operators block. HTML5 names it ∟. It marks a 90° corner in geometry — not the general angle ∠ (∠, U+2220).
