Across
1
Lines that never intersect
5
Mathematical rule or equation
6
Collection of distinct elements
7
Divisible by two
8
Three-sided polygon
9
Comparison of two quantities
12
Amount of space an object occupies
Down
2
Sum divided by count
3
Proven mathematical statement
4
Rectangular array of numbers
10
Value that does not change
11
Result of raising a number to an exponent
13
Closed shape with straight sides