Across
1
Part of a line with two endpoints
4
Part of a circle's circumference
5
Part of a whole number
7
Mathematical statement of equality
8
Difference between highest and lowest values
Down
1
Collection of distinct elements
2
Line crossing from corner to corner
3
Closed shape with straight sides
6
Proven mathematical statement
9
Corner point of a polygon
10
Round shape with all points equidistant
11
Mathematical rule or equation
12
System of ordered marks for measuring
13
Space between two intersecting lines