Across
1
Round shape with all points equidistant
5
Proven mathematical statement
6
Math using letters for unknown values
7
Result of multiplication
8
Longest side of a right triangle
9
Three-sided polygon
10
Part of a circle's circumference
12
Divisible by two
Down
2
Middle value in an ordered dataset
3
Mathematical statement of equality
4
Lines that never intersect
11
Number less than zero
13
Single numeral from 0 to 9
14
Collection of distinct elements