Number Sets Crossword

The symbol is a capital U.
The _________ A ∩ B of two sets A and B is the set that contains all elements of A that also belong to B
Refers to a special case in the system of equations in which the two lines actually lie directly on top of each other
Two angles that add up to 90 degrees
Sets that have no element in common
Without any bound or larger than any natural number
Set which one could principle count and finish counting
No elements in a set
Where the numerator is less than the denominator
Where the numerator is more than the denominator
Example: set A is contained inside set B
A measure of the number of elements of the set
Similar or identical in value
The same measure, quantity, amount, or number
One set can be evenly matched with the members of a second set
Curve in a plane surrounding two focal points
Numbers that are negative, positive, large, small, etc.
Numbers that are positive without decimals or fractions
Also called natural numbers
A number that cannot be expressed as a ratio between two integers; not an imaginary number