Measured Angle Opening Left Symbol
⦛ denotes a measured angle opening on the left in mathematical notation.
U+299B
⦛ is the “measured angle opening left” symbol (U+299B). It’s used to represent an angle measurement with a specific opening orientation. Copy it directly from this page for math, documents, or UI text.
Measured Angle Opening Left Symbol Meaning
The symbol ⦛ (Unicode U+299B) is named “MEASURED ANGLE OPENING LEFT.” In notation, it indicates an angle that is being measured, with the opening oriented to the left. Like other angle and measurement marks, it helps distinguish the geometry operation being described, especially in technical writing, diagrams, or formatted equations. You’ll most often see it in contexts where angle measures need a visually specific delimiter or bracket-like marker that conveys directionality. It’s particularly useful when consistent glyph choice matters across documents, web typography, and developer-rendered text.
Common uses
- •Labeling or formatting measured angles in geometry notes
- •Annotating angles in diagrams where the opening direction must be explicit
- •Using as a typographic marker in mathematical expressions and worksheets
- •Adding direction-specific angle notation in educational materials
- •Rendering consistent symbols in web or app interfaces for math content
Examples
⦛ Measured angle opening left
- ⦛“Find the value of ∠x ⦛.”
- ⦛“Angle A is measured using ⦛.”
- ⦛“Mark the measured opening left as ⦛ in the diagram.”
- ⦛“Use ⦛ to denote the left-opening measured angle.”
- ⦛“Substitute the angle measure into the expression with ⦛.”
Variations
Ready to copy
Technical codes
| Unicode | U+299B | |
| HTML Entity | ⦛ | |
| HTML Code | ⦛ | |
| CSS | \299B | |
| Alt Code | Alt + 10651 | |
| Decimal | 10651 |
How to type Measured Angle Opening Left Symbol (⦛)
On Windows
Hold Alt and type 10651 on the numeric keypad. In Word, type 299B then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 299B. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 299b, then press Enter or Space.
Anywhere
Copy ⦛ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What is the Unicode for ⦛?
⦛ is Unicode U+299B (named “MEASURED ANGLE OPENING LEFT”).
How do I copy the symbol for HTML?
Use the HTML entity: ⦛.
What does the “opening left” part indicate?
It specifies the direction/orientation of the measured angle mark so the opening is on the left.
Will it work in browsers and documents?
Support depends on your font and platform. If the glyph doesn’t display, try a Unicode-capable math or symbol font.