+ 
plus (addition) 
– 
minus (subtraction) 
×, · 
times (multiplication) 
divides comma long division symbol enclosing , 
divide (division) 
= 
is equal to 
< 
is less than 
> 
is greater than 
≤ 
is less than or equal to 
≥ 
is greater than or equal to 
≠ 
is not equal to 
( ) 
parentheses for grouping 
[ ] 
brackets for grouping 
–a 
opposite of a 
… 
and so on 
° 
degrees 
 a  
absolute value of a 

Is the statement true? 
≈ 
is approximately equal to 
b over eh 
reciprocal of eh over b 
A 
area 
ℓ 
length 
w 
width 
h 
height 
d 
distance 
r 
rate 
t 
time 
P 
perimeter 
b 
base length 
C 
circumference 
d 
diameter 
r 
radius 
S.A. 
surface area 
B 
area of base 
L.A. 
lateral area 
ℓ 
slant height 
V 
volume 
a ^{ n } 
nth power of a 
square root of x 
nonnegative square root of x 
π 
pi, an irrational number approximately equal to 3.14 
(a, b) 
ordered pair with xcoordinate a and ycoordinate b 
eh b bar 
segment AB 
A′ 
image of A, A prime 
ΔABC 
triangle with vertices A, B, and C 
→ 
arrow notation 
eh colon b comma , eh over b 
ratio of a to b 
≅ 
is congruent to 
~ 
is similar to 
∠A 
angle with vertex A 
AB 
length of segment eh b bar 
eh b vector 
ray AB 
∠ABC 
angle formed by b eh vector and b c vector 
m∠ABC 
measure of angle ABC 
⊥ 
is perpendicular to 
modified eh b with left right arrow above 
line AB 
 
is parallel to 
% 
percent 
P (event) 
probability of an event 