Across
1
Rectangle with four equal sides
4
Number divisible only by 1 and itself
5
Value that does not change
6
Rectangular array of numbers
7
Middle value in an ordered dataset
8
Number that divides evenly into another
11
Steepness of a line
12
System of ordered marks for measuring
Down
2
Distance from center to edge of circle
3
Total distance around a shape
9
Sum divided by count
10
Divisible by two
13
Space between two intersecting lines