Across
1
Space between two intersecting lines
3
Symbol representing unknown value
4
System of ordered marks for measuring
5
Split into equal parts
6
Proven mathematical statement
Down
1
Sum divided by count
2
Mathematical rule or equation
5
Single numeral from 0 to 9
7
Lines that never intersect
8
Math using letters for unknown values
9
Part of a line with two endpoints
10
Number less than zero