

arc (as in ) 


add; plus; positive 


subtract; minus; negative 


plus or minus 


multiply; times; cross 


multiply; times 


divide 


divide by (as in ) 


angle 


circle 


cube root 


divide 


nth root 


parallelogram 


rectangle 


square root 


triangle 
... 

between two symbols or at the end of a sequence or series to denote omission 


line AB 


ray AB 


line segment AB 


vector AB 


perpendicular 


is similar to 


not (when used as a connective) 


is congruent to (in figures) 


is congruent to (in numbers) 


therefore 


as 


is to (as in proportions such as a:b = c:d) 
$ 

dollar sign 


cent sign 


repeating decimal 1.444. . . 
 

parallel 


degree 


degree Celsius 


degree Fahrenheit 
= 

equals 


is not equal to 
< 

is less than 
> 

is greater than 
< 

is less than or equal to 
> 

is greater than or equal to 


is approximately equal to 


intersection 


union; join 


empty set 
{ } 

encloses a set 


is a subset of 


is not a subset of 
[ ) 

halfclosed interval 
( ] 

halfopen interval 
[ ] 

closed interval 
% 

percent 
a 

absolute value of a 
! 

factorial 


foot or minute 


inch or second 


infinity 
(x,y) 

coordinates of a point on a plane 
(x,y,z) 

coordinates of a point in space 
( ) 

shows order of operations, as in (1+2)×4 = 3×4 = 12 


pi (approximately 3.1415926) 
e 

the base of natural logarithms (approximately 2.71828183) 