Across
1
U-shaped curve of a quadratic function
3
Number divisible only by 1 and itself
6
Difference between highest and lowest values
7
Three-sided polygon
8
Divisible by two
9
Part of a circle's circumference
Down
2
Part of a whole number
4
Rectangular array of numbers
5
Collection of distinct elements
6
Comparison of two quantities
9
Math using letters for unknown values
10
Total distance around a shape