U+299D Measured Right Angle with Dot
U+299D was added to Unicode in version 3.2 (2002). It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is mirrored. In text U+299D behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
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  10653 
UTF8  E2 A6 9D 
UTF16  29 9D 
UTF32  00 00 29 9D 
URLQuoted  %E2%A6%9D 
HTML hex reference  ⦝ 
Wrong windows1252 Mojibake  â¦ 
HTML named entity  ⦝ 
Elsewhere
Complete Record
Property  Value 

3.2 (2002)  
MEASURED RIGHT ANGLE WITH DOT  
—  
Miscellaneous Symbols  
Math Symbol  
Common  
Other Neutral  
Not Reordered  
None  


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Any  
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NA  
Other  
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Yes  
Yes  


Yes  
Yes  
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None  
Neutral  
Not Applicable  
—  
No_Joining_Group  
Non Joining  
Alphabetic  
None  
not a number  


R 