Across
1
Divisible by two
4
Result of raising a number to an exponent
6
Split into equal parts
7
Distance from center to edge of circle
8
Number less than zero
12
Number with digits after a point
Down
2
Symbol representing unknown value
3
Corner point of a polygon
5
Parts per hundred
9
Single numeral from 0 to 9
10
Line touching circle at one point
11
Value that does not change
13
Amount of space an object occupies