U+221F Right Angle
U+221F was added to Unicode in version 1.1 (1993). It belongs to the block Mathematical Operators in the Basic Multilingual Plane.
This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as with (in chess notation).
The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Other Neutral and is mirrored. Its corresponding mirrored glyph is Reversed Right Angle. In text U+221F behaves as Ambiguous (Alphabetic or Ideographic) regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
The CLDR project labels this character “right angle” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: mathematics, right angle.
The Wikipedia has the following information about this codepoint:
In geometry and trigonometry, a right angle is an angle of exactly 90 degrees or π {displaystyle pi } /2 radians corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. The term is a calque of Latin angulus rectus; here rectus means "upright", referring to the vertical perpendicular to a horizontal base line.
Closely related and important geometrical concepts are perpendicular lines, meaning lines that form right angles at their point of intersection, and orthogonality, which is the property of forming right angles, usually applied to vectors. The presence of a right angle in a triangle is the defining factor for right triangles, making the right angle basic to trigonometry.
Representations
| System | Representation |
|---|---|
| Nº | 8735 |
| UTF-8 | E2 88 9F |
| UTF-16 | 22 1F |
| UTF-32 | 00 00 22 1F |
| URL-Quoted | %E2%88%9F |
| HTML hex reference | ∟ |
| Wrong windows-1252 Mojibake | ∟ |
| HTML named entity | ∟ |
| alias | with (in chess notation) |
| Encoding: JIS0208 (hex bytes) | AD F8 |
| LATEX | \rightangle |
| AGL: Latin-5 | orthogonal |
| Adobe Glyph List | orthogonal |
| Adobe Glyph List | rightangle |
| digraph | -L |
Related Characters
Elsewhere
Complete Record
| Property | Value |
|---|---|
| 1.1 (1993) | |
| RIGHT ANGLE | |
| — | |
| Mathematical Operators | |
| Math Symbol | |
| Common | |
| Other Neutral | |
| Not Reordered | |
| None | |
| Right Angle | |
| ✘ | |
| Right Angle | |
| Right Angle | |
| ✘ | |
| Right Angle | |
| Right Angle | |
| Right Angle | |
| Right Angle | |
| Right Angle | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Right Angle | |
| Any | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| — | |
| NA | |
| Other | |
| — | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| Yes | |
| Yes | |
| Right Angle | |
| Yes | |
| Yes | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Reversed Right Angle | |
| Right Angle | |
| None | |
| Ambiguous | |
| Not Applicable | |
| — | |
| No_Joining_Group | |
| Non Joining | |
| Ambiguous (Alphabetic or Ideographic) | |
| None | |
| not a number | |
| Right Angle | |
| R |