HTML Entity for Right Angle (∟)
What You'll Learn
How to display the Right Angle symbol (∟) in HTML using numeric references, the named entity, and CSS escapes. This character is U+221F (RIGHT ANGLE) in the Mathematical Operators block (U+2200–U+22FF)—used in geometry, mathematical notation, and academic documentation to denote a 90° angle.
You can use the named entity ∟, hex ∟, decimal ∟, or CSS \221F. Do not confuse ∟ with U+2220 (∠, general angle) or U+22BE (⊾, right angle with arc).
⚡ Quick Reference — Right Angle
U+221FMathematical Operators (U+2200–U+22FF)
∟Hexadecimal reference
∟Decimal reference
∟Standard HTML entity
Name Value
──────────── ──────────
Unicode U+221F
Hex code ∟
HTML code ∟
Named entity ∟
CSS code \221F
Meaning Right angle (90°)
Related U+2220 = angle (∠)
U+2221 = measured angle (∡)
U+22BE = right angle with arc (⊾)
Block Mathematical Operators (U+2200–U+22FF)Complete HTML Example
A simple example showing ∟ using hexadecimal code, decimal HTML code, the named entity, and a CSS content escape:
<!DOCTYPE html>
<html>
<head>
<style>
#point::after{
content: "\221F";
}
</style>
</head>
<body>
<p>Right angle (hex): ∟</p>
<p>Right angle (decimal): ∟</p>
<p>Right angle (named): ∟</p>
<p id="point">Right angle (CSS): </p>
</body>
</html>🌐 Browser Support
U+221F is widely supported in all modern browsers:
👀 Live Preview
See the Right Angle symbol (∟) in geometric contexts:
🧠 How It Works
Hexadecimal Code
∟ uses Unicode hex 221F to display the right angle symbol.
Decimal HTML Code
∟ is the decimal equivalent (8735) for the same character.
Named HTML Entity
∟ is the standard named entity for U+221F—readable in HTML source.
CSS Entity
\221F is the CSS escape for U+221F, used in pseudo-element content.
Same visual result
All four methods produce ∟. Unicode U+221F in Mathematical Operators. Next: Right Angle Arc.
Use Cases
The Right Angle symbol (∟) is commonly used in:
Diagrams, proofs, and textbooks marking 90° corners.
Formal expressions and notation involving perpendicular lines.
Research papers, math journals, and scholarly publications.
Technical drawings, specifications, and CAD documentation.
Character pickers, entity documentation, and math symbol guides.
Pair ∟ with descriptive text or MathML when used as a meaningful symbol.
💡 Best Practices
Do
- Use
∟for readable right angle markup - Set
<meta charset="utf-8">for reliable rendering - Use ∟ for right angles—not general angle ∠
- Link to Measured Angle and Angle when documenting related symbols
- Pick one reference style per project for consistency
Don’t
- Confuse ∟ with angle ∠ or measured angle ∡
- Use padded Unicode notation like U+0221F—the correct value is
U+221F - Use CSS escape
\221Fin HTML text nodes - Substitute an L-shaped ASCII character when ∟ is required formally
- Assume every font renders Mathematical Operators identically
Key Takeaways
Four ways to render U+221F in HTML and CSS
∟ ∟For CSS stylesheets, use \221F in the content property
Unicode U+221F — RIGHT ANGLE (∟)
Distinct from angle ∠, measured angle ∡, and right angle arc ⊾
Previous: Rial Sign (﷼) Next: Right Angle Arc
❓ Frequently Asked Questions
∟ (named entity), ∟ (hex), ∟ (decimal), or \221F in CSS content. All four render ∟.U+221F (RIGHT ANGLE). Mathematical Operators block (U+2200–U+22FF). Hex 221F, decimal 8735. Denotes a 90° angle.∟ is the standard named entity for U+221F and is the most readable option in HTML source.Explore More HTML Entities!
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