Across
1
Distance from center to edge of circle
3
Divisible by two
6
Result of raising a number to an exponent
9
Longest side of a right triangle
11
Three-sided polygon
Down
2
Symbol representing unknown value
4
Repeated addition
5
Single numeral from 0 to 9
7
Visual representation of data
8
Amount of space an object occupies
10
Split into equal parts
12
Part of a line with two endpoints
13
Math using letters for unknown values