Across
1
Collection of distinct elements
3
Math using letters for unknown values
5
Result of multiplication
6
Closed shape with straight sides
7
Symbol representing unknown value
8
Difference between highest and lowest values
9
Total distance around a shape
10
Rectangle with four equal sides
Down
2
Distance from center to edge of circle
3
Sum divided by count
4
Proven mathematical statement
6
Number divisible only by 1 and itself
11
Corner point of a polygon