Across
1
Result of multiplication
4
Round shape with all points equidistant
5
Proven mathematical statement
9
Mathematical statement of equality
10
System of ordered marks for measuring
12
Math using letters for unknown values
Down
2
Number less than zero
3
Amount of space an object occupies
6
The number representing nothing
7
Longest side of a right triangle
8
Collection of distinct elements
11
Line crossing from corner to corner