Across
1
Math using letters for unknown values
5
Line crossing from corner to corner
6
Part of a whole number
7
Total distance around a shape
10
Collection of distinct elements
Down
2
Middle value in an ordered dataset
3
Result of multiplication
4
Three-sided polygon
8
Closed shape with straight sides
9
Longest side of a right triangle
11
Round shape with all points equidistant
12
Part of a circle's circumference
13
Comparison of two quantities