Across
1
Closed shape with straight sides
3
Collection of distinct elements
4
Split into equal parts
5
Exact correspondence on both sides
6
Value that does not change
10
Space between two intersecting lines
11
Power to which a number is raised
Down
2
Part of a whole number
4
Line crossing from corner to corner
5
Part of a line with two endpoints
7
Proven mathematical statement
8
Rectangle with four equal sides
9
Mathematical statement of equality
12
Lines that never intersect