Across
1
Longest side of a right triangle
6
Middle value in an ordered dataset
7
Difference between highest and lowest values
11
Collection of distinct elements
12
Round shape with all points equidistant
13
Single numeral from 0 to 9
Down
2
System of ordered marks for measuring
3
Steepness of a line
4
Amount of space an object occupies
5
Number divisible only by 1 and itself
8
Number less than zero
9
Number greater than zero
10
Proven mathematical statement