Across
1
Rectangular array of numbers
4
Number divisible only by 1 and itself
5
Round shape with all points equidistant
6
Divisible by two
7
Part of a circle's circumference
9
Number less than zero
10
U-shaped curve of a quadratic function
Down
2
Exact correspondence on both sides
3
Middle value in an ordered dataset
4
Closed shape with straight sides
5
Line segment connecting two circle points
7
Sum divided by count
8
Comparison of two quantities
11
Split into equal parts
12
Number with digits after a point