HTML Entity for Measured Angle (∡)
What You'll Learn
How to display the measured angle (∡) in HTML using hexadecimal, decimal, the named entity ∡, and CSS escape methods. This character is U+2221 (MEASURED ANGLE) in the Mathematical Operators block (U+2200–U+22FF)—used in geometry and technical notation to denote a measured angle, distinct from the plain angle symbol (∠, U+2220).
Render it with ∡, ∡, ∡, or CSS escape \2221. For the standard angle symbol use ∠ (∠, U+2220).
⚡ Quick Reference — Measured Angle
U+2221Mathematical Operators block
∡Hexadecimal reference
∡Decimal reference
∡HTML5 named entity for U+2221
Name Value
──────────── ──────────
Unicode U+2221
Hex code ∡
HTML code ∡
Named entity ∡
CSS code \2221
Related U+2220 = angle (∠); U+2222 = spherical angle (∢)Complete HTML Example
This example demonstrates the measured angle (∡) using hexadecimal code, decimal HTML code, the named entity ∡, and a CSS content escape:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\2221";
}
</style>
</head>
<body>
<p>Measured Angle using Hexadecimal: ∡</p>
<p>Measured Angle using HTML Code: ∡</p>
<p>Measured Angle using HTML Entity: ∡</p>
<p id="point">Measured Angle using CSS Entity: </p>
</body>
</html>🌐 Browser Support
The measured angle entity is universally supported in modern browsers:
👀 Live Preview
See the measured angle (∡) in mathematical and geometric contexts:
🧠 How It Works
Hexadecimal Code
∡ uses the Unicode hexadecimal value 2221 to display the measured angle. The x prefix indicates hexadecimal format.
Decimal HTML Code
∡ uses the decimal Unicode value 8737 to display the same character.
Named Entity
∡ is the semantic named entity — the easiest to read in source HTML and the most self-descriptive option.
CSS Entity
\2221 is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.
Same visual result
All four methods produce the measured angle glyph: ∡. Unicode U+2221 sits in the Mathematical Operators block (U+2200–U+22FF).
Use Cases
The measured angle (∡) commonly appears in:
Angle measure notation such as m∡ABC in textbooks and proofs.
Technical diagrams, CAD documentation, and structural angle specs.
Math courses, interactive geometry tools, and online homework platforms.
Vector diagrams and angular measurement in scientific content.
Academic articles and preprints with formal mathematical notation.
HTML entity tutorials and Unicode Mathematical Operators docs.
💡 Best Practices
Do
- Use
∡for readable source markup - Distinguish ∡ (measured) from ∠ (angle,
∠) - Pair with MathML or accessible text for complex formulas
- Pick one entity style (hex / decimal / named) per project
- Test glyph rendering across browsers and math fonts
Don’t
- Confuse ∡ with ∠ (angle) or ∢ (spherical angle)
- Mix entity styles randomly in one file
- Put CSS escape
\2221in HTML text nodes - Use HTML entities in JS (use
\u2221) - Use padded Unicode notation like U+02221—the correct value is
U+2221
Key Takeaways
Three HTML references all render ∡
∡ ∡ ∡For CSS stylesheets, use the escape in the content property
\2221Unicode U+2221 — MEASURED ANGLE in Mathematical Operators
Prefer ∡ for readability—it’s the most self-descriptive named entity
Not the same as ∠ (∠)—verify the symbol your notation requires
❓ Frequently Asked Questions
∡ (named), ∡ (hex), ∡ (decimal), or \2221 in CSS content. All produce ∡.U+2221 (MEASURED ANGLE). Mathematical Operators block (U+2200–U+22FF). Hex 2221, decimal 8737. Named entity: ∡.∡, ∡, or ∡) go directly in markup. The CSS escape \2221 is used in stylesheets, typically in the content property of pseudo-elements. Same visual result, different layers of the stack.∠. They denote different concepts in mathematical notation.Explore More HTML Entities!
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