Across
1
Single numeral from 0 to 9
4
Part of a circle's circumference
5
Amount of space an object occupies
6
Divisible by two
7
Lines that never intersect
8
Space between two intersecting lines
10
Three-sided polygon
Down
2
Number less than zero
3
Line touching circle at one point
7
Closed shape with straight sides
9
Round shape with all points equidistant
11
Result of multiplication
12
Result of raising a number to an exponent