Across
1
Result of multiplication
5
Difference between highest and lowest values
6
Longest side of a right triangle
9
Number with digits after a point
11
Single numeral from 0 to 9
12
Line crossing from corner to corner
Down
2
Part of a circle's circumference
3
Result of addition
4
Mathematical statement of equality
7
Line segment connecting two circle points
8
Symbol representing unknown value
10
Lines that never intersect