Across
1
Part of a line with two endpoints
4
The number representing nothing
5
Number with digits after a point
6
System of ordered marks for measuring
8
Math using letters for unknown values
9
Space between two intersecting lines
10
Reference line in a graph
Down
1
Collection of distinct elements
2
Difference between highest and lowest values
3
Repeated addition
5
Line crossing from corner to corner
6
Steepness of a line
7
Rectangle with four equal sides
10
Part of a circle's circumference