HTML Entity for Geometric Proportional (∺)

Beginner
5 min read
Updated: Sep 2026
1 example
Unicode U+223A
HTML Entity for geometric proportional (U+223A) tutorial illustration
Definition

What Is Geometric Proportional?

Geometric proportional (∺) is the Unicode character at U+223A in Mathematical Operators. Official name: GEOMETRIC PROPORTION. It marks geometric proportion in math notation (named entity ∺).

Remember
Character     ∺
Unicode       U+223A
Named entity  ∺
Hex entity    ∺
Decimal       ∺
CSS escape    \223A
Meaning       geometric proportion
Not the same  ∝ (∝) · ≑ (≑) · :

Prefer ∺ in HTML. Alternatives: ∺, ∺, or type ∺ in a UTF-8 document.

Reference

Quick Reference

One table for every form you will actually use.

FormCodeWhere it goes
Named entity∺HTML markup (preferred)
Hex entity∺HTML markup
Decimal entity∺HTML markup
Direct character∺HTML text (UTF-8)
CSS escape\223AStylesheet content

When to Use Which

SituationUse
Readable HTML for ∺∺
“Is proportional to”Proportional to — ∝ (∝)
Geometrically equalGeometrically equal to — ≑ (≑)
Plain ASCIIWrite :: or geometric proportion in words
Generated text via ::before / ::aftercontent: "\223A"
See it

Live Preview

Symbol alone, in a sample expression, and next to related forms.

Glyph ∺
Large glyph ∺
Sample a ∺ b
Compared ∺   ∝   ≑   :
With entities Named: ∺ | Hex: ∺ | Decimal: ∺
Code

Complete HTML Example

One page that shows ∺ with named, hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.

Named + Hex + Decimal + CSS + Typed

Five ways to display ∺ in HTML and CSS.

html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Geometric Proportional (U+223A) in HTML</title>
  <style>
    #point::after {
      content: "\223A";
    }
  </style>
</head>
<body>
  <p>Built with Named: &mDDot;</p>
  <p>Built with Hex: &#x223A;</p>
  <p>Built with Decimal: &#8762;</p>
  <p id="point">Built with CSS: </p>
  <p>Typed: ∺</p>
  <p>Sample: <span aria-label="a geometric proportion b">a &mDDot; b</span></p>
  <p>Related: &prop; &eDot;</p>
</body>
</html>
Try It Yourself

How It Works

1. Named: &mDDot; is the HTML5 name for U+223A → ∺. Prefer this in markup.

2. Hex: &#x223A; inserts the same code point. Same visual as named.

3. Decimal: same code point as 8762 → &#8762;.

4. CSS: use \223A in content (not an HTML entity). #point::after appends ∺.

5. Typed: paste ∺ in a UTF-8 document when you need the geometric proportion glyph. Compare with &prop; and &eDot; for related operators.

Pitfalls & Tips

Common mistakes when working with geometric proportional.

Name

Prefer &mDDot;

The named entity is clearer than inventing &geomprop;. Use &mDDot; for U+223A.

∝

Not &prop;

Proportional to is ∝ (U+221D). Geometric proportion is ∺. Choose the operator that matches your meaning.

≑

Not geometrically equal

Geometrically equal to is ≑ (&eDot;). Related math family — different code point.

Font

Font coverage

Some fonts omit Mathematical Operators. If ∺ is missing, fall back to a math-capable font.

CSS vs HTML

Do not mix escapes

\223A belongs in CSS strings. &mDDot; / &#x223A; / &#8762; belong in HTML.

a11y

Add accessible text

Screen readers may not announce ∺ clearly. Prefer aria-label or nearby prose for important equations.

Semicolon

End references

Always finish entities with ; — write &mDDot;, not &mDDot.

Compatibility

Browser Support

Geometric proportional (U+223A) and its entity forms (&mDDot;, &#x223A;, &#8762;, CSS \\223A) are supported in all mainstream browsers. Visible glyphs depend on Mathematical Operators font coverage.

✓ Universal support

Geometric Proportional (&#x223A;)

Encode with named, hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.

100% Browser coverage
Google Chrome Supported
Yes
Microsoft Edge Supported
Yes
Mozilla Firefox Supported
Yes
Apple Safari Supported
Yes
Opera Supported
Yes
Internet Explorer All versions
Yes
U+223A Full support

Bottom line: Prefer &mDDot; in HTML. Use &#x223A; / &#8762; when numeric form is required, and \\223A only inside CSS content.

Remember

Key Takeaways

  • Unicode: geometric proportional is U+223A (decimal 8762) — glyph ∺.
  • HTML: prefer &mDDot; — also &#x223A; / &#8762; / type ∺.
  • CSS: use \223A inside content for generated text.
  • Meaning: ∺ ≠ ∝ (use &prop; for “proportional to”).

One line: U+223A → &mDDot; / &#x223A; / &#8762; / CSS \223A.

Frequently Asked Questions

Prefer &mDDot; (named). You can also use &#x223A; (hex), &#8762; (decimal), type ∺ in UTF-8, or the CSS escape \223A in content.
U+223A (GEOMETRIC PROPORTION). Hex 223A, decimal 8762. It belongs to Mathematical Operators (U+2200–U+22FF).
Yes. HTML5 defines &mDDot; for U+223A. Prefer it over numeric forms when you want readable markup.
Use it in mathematical or geometric text that needs the geometric proportion operator. For “is proportional to,” prefer &prop; (U+221D) instead.
HTML entities (&mDDot;, &#8762;, or &#x223A;) go in markup. The CSS escape \223A goes in stylesheet strings (usually content on ::before/::after).
No. U+223A is geometric proportion (∺, &mDDot;). Proportional to is U+221D (∝, &prop;). Related ideas, different symbols.

Did you know?

Geometric proportional is Unicode U+223A (decimal 8762) — glyph ∺ (GEOMETRIC PROPORTION) in Mathematical Operators. HTML5 named entity: &mDDot;. Prefer &mDDot; in HTML. It is not the same as proportional to (∝, &prop;) or geometrically equal to (≑, &eDot;).

Next: Geometrically Equal To

Learn the HTML entity for geometrically equal to (U+2251).

Geometrically equal to tutorial →

About the author

Mari Selvan M P
Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

  • Experience 12 years building web and cloud systems
  • Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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