Across
1
Space between two intersecting lines
4
Power to which a number is raised
5
Part of a circle's circumference
6
Corner point of a polygon
9
Single numeral from 0 to 9
11
Closed shape with straight sides
12
Line crossing from corner to corner
Down
2
Rectangular array of numbers
3
Lines that never intersect
7
Symbol representing unknown value
8
Number greater than zero
10
Exact correspondence on both sides
11
Result of multiplication
13
Line touching circle at one point