Across
1
Math using letters for unknown values
4
Collection of distinct elements
5
Amount of space an object occupies
6
Proven mathematical statement
7
Divisible by two
9
Line segment connecting two circle points
11
Result of multiplication
Down
2
Number that divides evenly into another
3
Round shape with all points equidistant
5
Corner point of a polygon
8
Space between two intersecting lines
10
Rectangle with four equal sides
11
Result of raising a number to an exponent
12
Exact correspondence on both sides
13
Three-sided polygon