Across
1
Repeated addition
4
Rectangle with four equal sides
6
Round shape with all points equidistant
10
Part of a circle's circumference
11
Power to which a number is raised
12
Collection of distinct elements
Down
2
Exact correspondence on both sides
3
Amount of space an object occupies
5
Result of raising a number to an exponent
7
Closed shape with straight sides
8
Number with digits after a point
9
Number greater than zero
13
Middle value in an ordered dataset