Across
1
Value that does not change
6
Total distance around a shape
7
Round shape with all points equidistant
9
Result of multiplication
13
Parts per hundred
Down
2
Proven mathematical statement
3
System of ordered marks for measuring
4
Repeated addition
5
Space between two intersecting lines
8
Part of a line with two endpoints
10
Symbol representing unknown value
11
Line touching circle at one point
12
Split into equal parts