Across
1
Rectangle with four equal sides
5
Part of a circle's circumference
6
Number divisible only by 1 and itself
7
Split into equal parts
8
Number greater than zero
10
Visual representation of data
11
Steepness of a line
Down
2
Longest side of a right triangle
3
Three-sided polygon
4
Lines that never intersect
9
Corner point of a polygon