Across
1
Amount of space an object occupies
2
Rectangle with four equal sides
7
Line segment connecting two circle points
8
Result of raising a number to an exponent
10
Steepness of a line
11
Line touching circle at one point
12
Round shape with all points equidistant
Down
2
Collection of distinct elements
3
Repeated addition
4
Divisible by two
5
Mathematical statement of equality
6
Part of a whole number
9
Value that does not change