Measured angle (∡) is the Mathematical Operators character at Unicode U+2221 (MEASURED ANGLE). It is used in geometry and technical notation to mark an angle that has been measured.
Remember
Character ∡
Unicode U+2221
Named entity ∡
Hex entity ∡
Decimal ∡
CSS escape \2221
Named, hex, decimal, CSS, and a typed character all produce the same glyph: ∡. Prefer ∡ in HTML source for clarity.
Using Named Entity: ∡
Using Hex Code: ∡
Using HTML Code: ∡
Using CSS Entity: ∡
Notation: m∡ABC = 90°
How It Works
1. Named:∡ is the clearest HTML form and renders ∡.
2. Hex:U+2221 → ∡ in HTML. Same result as the named entity.
3. Decimal: same code point as 8737 → ∡. Same result as hex.
4. CSS: use \2221 in content (not an HTML entity). #point::after appends that ∡ after the paragraph text.
Pitfalls & Tips
Common mistakes when working with the measured angle.
Named
Prefer ∡
The named entity is clearer than numeric forms and is defined in HTML5.
Look-alikes
Not ∠
Plain angle ∠ is U+2220. Measured angle ∡ is U+2221 — different characters.
Font
Glyph support varies
Some fonts miss Mathematical Operators glyphs — test with a Unicode-capable math or system font.
CSS vs HTML
Do not mix escapes
\2221 belongs in CSS. ∡ / ∡ / ∡ belong in HTML.
Encoding
Declare UTF-8
If you type ∡ directly, keep <meta charset="UTF-8"> so the file is not misread.
Semicolon
End references
Always finish with ; — write ∡, not &angmsd.
Compatibility
Browser Support
Measured angle (U+2221) and its entity forms (∡, ∡, ∡, CSS \\2221) are supported in all mainstream browsers with a Unicode-capable font.
✓ Universal encoding
Measured Angle (∡)
Encode with named, hex, decimal, or CSS escape — or type ∡ directly in UTF-8 HTML.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerIE 9+
Yes*
U+2221Full support
Bottom line: Prefer ∡ for readable HTML. Use \\2221 only inside CSS content.
Remember
Key Takeaways
Unicode: measured angle is U+2221 (decimal 8737).
HTML: prefer ∡ — or use ∡ / ∡.
CSS: use \2221 inside content for generated text.
Related:∠ (∠) is a different character from ∡ (∡).
Use ∡ (named), ∡ (hex), ∡ (decimal), or the CSS escape \2221 in the content property. All render ∡. Prefer ∡ in HTML source.
U+2221 (MEASURED ANGLE). Hex 2221, decimal 8737. It belongs to the Mathematical Operators block.
Yes. ∡ is the HTML5 named entity for ∡. The plain angle symbol is ∠ (∠, U+2220).
Use it in geometry notation, engineering diagrams, and technical content that marks a measured angle — for example m∡ABC = 90°.
HTML entities (∡, ∡, or ∡) go in markup. The CSS escape \2221 is used in stylesheets (usually in the content property of ::before/::after). Both render ∡.
No. Angle is ∠ (∠, U+2220). Measured angle is ∡ (∡, U+2221) — a different Mathematical Operators character.
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Did you know?
Measured angle is Unicode U+2221 (decimal 8737) — MEASURED ANGLE in Mathematical Operators. HTML5 provides ∡. Related: angle ∠ (∠, U+2220) and right angle ∟ (∟, U+221F).
