Across
1
Result of multiplication
3
Space between two intersecting lines
4
System of ordered marks for measuring
6
Round shape with all points equidistant
7
Mathematical statement of equality
10
Rectangular array of numbers
11
Longest side of a right triangle
Down
2
Single numeral from 0 to 9
4
Steepness of a line
5
Collection of distinct elements
8
Reference line in a graph
9
Line crossing from corner to corner