Across
1
Number greater than zero
5
U-shaped curve of a quadratic function
6
Steepness of a line
8
Collection of distinct elements
9
Rectangular array of numbers
10
Total distance around a shape
Down
2
Space between two intersecting lines
3
Three-sided polygon
4
Line crossing from corner to corner
7
Comparison of two quantities
8
Part of a line with two endpoints
11
Repeated addition