COMMON MATHEMATICAL SYMBOLS

Symbol	Meaning	Example
	is not equal to	4 + 9 12
	is approximately equal to	2.00012 2
>	is greater then	16 > 5
	is greater than or equal to	x 3 means that x can be 3 or any number larger than 3
<	is less than	y < 20 means that y can be any number less than 20 but it can not be 20
	is less than or equal to	y 20 means that y can be 20 or any number less than 20
	plus or minus	x = 4 means that x has two values, +4 and ‑4
	a multiplication symbol	= 3 x 4
	radical sign (most often used with square roots)	= 7 since 7 = 49
	parallel to
	perpendicular to	Line 1 Line 2
	angle	If x = then x is a right angle.
	triangle	ABC is a triangle with vertices at A, B, and C.
	pi	The relationship of the circumference to the diameter of a circle: C = D. 3.14 22/7
	implies	x + 2 = 5 x = 3.
|x|	the absolute value of x, which is the positive value of x	|7| = 7 |-7| = 7
: and ::	"is to" and "as"	3 : 4 :: 6 : 8 is a way of writing ratios. We say 3 is to 6 as 4 is to 8. We also can write