Across
1
Collection of distinct elements
3
Middle value in an ordered dataset
5
Number divisible only by 1 and itself
6
Part of a circle's circumference
9
Symbol representing unknown value
10
Line segment connecting two circle points
11
Total distance around a shape
Down
2
Split into equal parts
4
Proven mathematical statement
7
Round shape with all points equidistant
8
Line touching circle at one point
9
Corner point of a polygon
11
Result of raising a number to an exponent
12
Parts per hundred
13
Rectangle with four equal sides