Across
1
Exact correspondence on both sides
2
Space between two intersecting lines
5
Number greater than zero
7
Round shape with all points equidistant
10
System of ordered marks for measuring
12
Mathematical rule or equation
13
Result of addition
14
Math using letters for unknown values
Down
2
Sum divided by count
3
Difference between highest and lowest values
4
Repeated addition
6
Line segment connecting two circle points
8
Symbol representing unknown value
9
Proven mathematical statement
11
Steepness of a line