Across
1
System of ordered marks for measuring
3
Comparison of two quantities
4
Divisible by two
6
Closed shape with straight sides
7
Total distance around a shape
9
Sum divided by count
Down
2
Round shape with all points equidistant
5
Three-sided polygon
8
Difference between highest and lowest values
10
Power to which a number is raised
11
Mathematical statement of equality
12
Rectangular array of numbers