Across
1
Part of a whole number
5
Three-sided polygon
6
Part of a circle's circumference
7
Round shape with all points equidistant
8
Number less than zero
9
Number greater than zero
11
Longest side of a right triangle
13
Single numeral from 0 to 9
Down
2
Value that does not change
3
Power to which a number is raised
4
Result of raising a number to an exponent
10
Total distance around a shape
12
Number divisible only by 1 and itself