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⦛

measured angle opening left

Measured angle opening left

⦛ is a geometry sign for a measured angle that opens left. It marks an angle in a formula or diagram; surrounding notation gives its measure.

Text symbol

Search it as: measured angle symbol · angle symbol · type ⦛
Shows up in: Anything that takes text · its shape is whatever your font draws

What ⦛ means

It marks a measured angle whose opening faces left.

Angle notation predates this exact sign. A medieval translation of a geometry work uses an arc for an angle; Pierre Hérigone's 1634 math textbook Cursus mathematicus includes an angle mark. A proposal for encoding mathematical characters around 2000 lists this left-opening form. The older examples concern angle notation generally; the proposal names ⦛ specifically.

Specialist geometry notation for formulas, diagrams and mathematical text.

Don't confuse it with

∠

Angle

The ordinary angle sign; it does not carry the measured-angle marking.

⦜

Right Angle Variant With Square

A right-angle variant marked with a square; ⦛ is the left-opening measured-angle sign.

Questions people ask

Why does ⦛ show as a box on some devices?

Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.

How to type ⦛

Windows (Word)

Alt+XType 299B, then Alt+X to get ⦛.

Windows

Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).

macOS

Control+Command+SpaceOpen the character viewer and search “measured angle opening left”.

Linux

Ctrl+Shift+UType 299b, then Enter or Space.

HTML

⦛

CSS

\299B

LaTeX

To type ⦛ in LaTeX, write `\measuredangleleft` in a Unicode-math setup that defines it.

HTML

Use the numeric character reference `⦛`.

CSS

Use `\299B` in a quoted CSS `content` value.

Codes and encoding1 code points

HTML decimal

⦛

HTML hex

⦛

CSS content

content: "\299B";

Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.

URL encoded

%E2%A6%9B

On screen

Code points

JS .length

UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

Maths & numbers1,835 symbols

1️⃣📏📐✖️➕➖➗🟰♾️#️⃣*️⃣0️⃣