Across
1
System of ordered marks for measuring
3
Divisible by two
5
Repeated addition
7
Line crossing from corner to corner
8
Distance from center to edge of circle
9
Difference between highest and lowest values
10
Symbol representing unknown value
Down
1
Rectangle with four equal sides
2
Proven mathematical statement
4
Steepness of a line
5
Middle value in an ordered dataset
6
Number less than zero