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U+221F · Mathematical Operators

Right Angle ∟

The right angle symbol marks a 90-degree angle in geometry, drawn like the corner of a square. It appears in geometry notes and problem sets, such as ∟ABC for the right angle at vertex B. Its shape also made it useful as a line-drawing glyph on older PC character sets.

WindowsAlt 28
UnicodeU+221F
HTML∟
∟U+221F

Character codes

Unicode code pointU+221F
Decimal8735
HTML named entity∟
HTML (hex)∟
HTML (decimal)∟
CSS\221F
JavaScript\u221F
Python\u221F
UTF-8 bytesE2 88 9F
UTF-16221F
URL-encoded%E2%88%9F

Character details

Official nameRIGHT ANGLE
Unicode blockMathematical Operators
General categoryMath Symbol (Sm)
SymbolHero categoryMath Symbols
EmojiNo

How to type ∟

Windows

  • Hold Alt and type 28 on the numeric keypad (Num Lock on), then release Alt. Alt 28 uses the code page 437.
  • In Microsoft Word or Outlook: type 221F then press Alt + X.
  • Open Character Map (search “Character Map” in Start), tick “Advanced view”, search for “right angle”, then Select and Copy.

Mac

  • Press Control + Command + Space to open the Character Viewer, search “right angle”, and double-click the result.
  • With the Unicode Hex Input keyboard enabled (System Settings → Keyboard → Input Sources), hold Option and type 221F.

iPhone & Android

  • Tap Copy at the top of this page, then long-press where you want it and choose Paste.

Docs & web

  • Google Docs: Insert → Special characters, then search “right angle” or enter U+221F.
  • HTML: ∟ or ∟
  • Excel / Google Sheets: =UNICHAR(8735)

Examples

  • ∟ABC = 90°
  • Triangle PQR with ∟Q
  • Mark ∟ at the corner of the frame

Good to know

Don’t mix it up: It closely resembles the box-drawing corner └ (U+2514), which is meant for text-based tables and diagrams.

Tip: Its Alt code, 28, is a low control-range code; on Windows it only works in some applications, so copying it is more reliable.

Display: the character itself is always the same code point, but its shape comes from the font on the device showing it. If you see an empty box, the font lacks this glyph—the text is still correct.

Guides

Common Math Symbols and Their Meanings

Similar math symbols

Double Prime (Inches / Seconds)
For All
Partial Differential
There Exists
Empty Set
Increment (Delta)
Element Of
N-Ary Product
Summation Sign
Minus Sign
Square Root Symbol
Infinity Symbol
Intersection
Union
Integral Sign
Therefore Sign
Because Sign
Approximately Equal Sign
Not Equal Sign
Identical to
Less Than or Equal To
Greater Than or Equal To
Percent Sign
Plus Sign

See all 714 math symbols →

Questions

What is the Unicode for ∟?

It is U+221F (RIGHT ANGLE), decimal 8735.

Is there a Windows Alt code for it?

Yes: Alt 28 on the numeric keypad.

How do I type it on a Mac?

There is no built-in Option shortcut. Use the Character Viewer (Control + Command + Space) and search “right angle”, or copy it from this page.

What is the HTML code?

Use the named entity ∟ or the numeric reference ∟.