Across
1
U-shaped curve of a quadratic function
2
Steepness of a line
5
Sum divided by count
6
Divisible by two
7
Single numeral from 0 to 9
8
Split into equal parts
9
System of ordered marks for measuring
Down
1
Closed shape with straight sides
2
Exact correspondence on both sides
3
Number that divides evenly into another
4
Number less than zero