Across
1
Three-sided polygon
3
Result of addition
4
Number with digits after a point
6
The number representing nothing
7
Lines that never intersect
8
Line crossing from corner to corner
9
Comparison of two quantities
10
Single numeral from 0 to 9
11
Divisible by two
Down
1
Line touching circle at one point
2
Sum divided by count
3
Rectangle with four equal sides
5
Result of raising a number to an exponent
7
Closed shape with straight sides