Across
1
Divisible by two
4
Lines that never intersect
5
Single numeral from 0 to 9
6
Distance from center to edge of circle
7
Repeated addition
10
U-shaped curve of a quadratic function
11
Sum divided by count
Down
2
Round shape with all points equidistant
3
Total distance around a shape
4
Result of raising a number to an exponent
8
Reference line in a graph
9
Amount of space an object occupies
12
Number that divides evenly into another