Across
1
Part of a whole number
5
Closed shape with straight sides
6
System of ordered marks for measuring
9
Steepness of a line
11
Collection of distinct elements
13
Line segment connecting two circle points
Down
2
Divisible by two
3
Number less than zero
4
Longest side of a right triangle
7
Mathematical rule or equation
8
Visual representation of data
10
Exact correspondence on both sides
12
Proven mathematical statement