Right Triangle (⊿) is the Mathematical Operators character at Unicode U+22BF (RIGHT TRIANGLE). It is a right-angled triangle glyph used in geometry, math notes, and technical notation.
Remember
Character ⊿
Unicode U+22BF
Hex entity ⊿
Decimal ⊿
Named entity ⊿
CSS escape \22BF
Not the same △ (U+25B3) · Δ (∆)
All of these produce the same glyph: ⊿. Prefer ⊿ when you want an explicit entity.
Using Hex Code: ⊿
Using HTML Code: ⊿
Using Named Entity: ⊿
Using CSS Entity: ⊿
Area ⊿ = ½ × base × height
How It Works
1. Hex:U+22BF → ⊿ in HTML. The browser turns it into ⊿.
2. Decimal: same code point as 8895 → ⊿. Same result as hex.
3. Named:⊿ is the HTML5 name for this character.
4. CSS: use \22BF in content (not an HTML entity). #point::after appends that ⊿ after the paragraph text.
Pitfalls & Tips
Common mistakes when working with Right Triangle.
Look-alikes
⊿ ≠ △ ≠ ∆
⊿ is a right-angled triangle. △ is a general white triangle. Δ is increment — pick the code point you mean.
Name
⊿ spelling
The named entity is ⊿ (lower-right style name). There is no ▹ for this code point.
Corner
Not a right-angle mark
For a square corner (∟), use Right Angle (U+221F), not this triangle glyph.
CSS vs HTML
Do not mix escapes
\22BF belongs in CSS. ⊿ / ⊿ / ⊿ belong in HTML.
A11y
Add nearby words
Pair the glyph with label text (for example “right triangle ⊿”) or use aria-label when it stands alone.
Semicolon
End references
Always finish with ; — write ⊿, not &lrtri.
Compatibility
Browser Support
Right Triangle (U+22BF) and its entity forms (⊿, ⊿, ⊿, CSS \\22BF) are supported in all modern browsers. Glyph coverage depends on the font.
✓ Universal encoding
Right Triangle (⊿)
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+22BF / ⊿Full support
Bottom line: Prefer ⊿ for readable HTML. Use \\22BF only inside CSS content.
Use ⊿ (named), ⊿ (hex), ⊿ (decimal), or the CSS escape \22BF in the content property. You can also type ⊿ directly in UTF-8 HTML.
U+22BF (RIGHT TRIANGLE). Hex 22BF, decimal 8895. It belongs to the Mathematical Operators block (U+2200–U+22FF).
Yes. ⊿ is the HTML5 named entity. You can also use ⊿ or ⊿.
Use it in geometry, math notes, and technical docs when you need a right-angled triangle glyph. Prefer ⊿ for readable HTML.
HTML entities (⊿, ⊿, or ⊿) go in markup. The CSS escape \22BF is used in stylesheets (usually in the content property of ::before/::after). Both render ⊿.
U+22BF (⊿) is RIGHT TRIANGLE — a right-angled triangle math operator. U+25B3 is a white up-pointing triangle. Δ (U+2206) is increment / Delta. They are not interchangeable.
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Did you know?
Right Triangle is Unicode U+22BF (decimal 8895) — RIGHT TRIANGLE in Mathematical Operators. HTML5 provides ⊿. Prefer it for readable source. Do not confuse it with white up-pointing triangle △ (U+25B3) or increment Δ (U+2206).
