Across
1
Value that does not change
5
Steepness of a line
6
Lines that never intersect
7
Distance from center to edge of circle
8
U-shaped curve of a quadratic function
10
Space between two intersecting lines
Down
2
Rectangle with four equal sides
3
Rectangular array of numbers
4
System of ordered marks for measuring
6
Closed shape with straight sides
9
Collection of distinct elements