Across
1
Rectangle with four equal sides
5
Single numeral from 0 to 9
6
Steepness of a line
8
Parts per hundred
9
Lines that never intersect
10
System of ordered marks for measuring
Down
2
Mathematical rule or equation
3
Number greater than zero
4
Space between two intersecting lines
5
Line crossing from corner to corner
7
Longest side of a right triangle