Across
1
Corner point of a polygon
4
Math using letters for unknown values
7
Number greater than zero
8
Round shape with all points equidistant
10
Part of a circle's circumference
Down
2
Space between two intersecting lines
3
Split into equal parts
5
Line touching circle at one point
6
Total distance around a shape
9
Difference between highest and lowest values
10
Sum divided by count
11
Rectangle with four equal sides
12
Symbol representing unknown value