Across
1
Result of multiplication
3
Part of a line with two endpoints
5
System of ordered marks for measuring
6
Lines that never intersect
7
Comparison of two quantities
8
Result of raising a number to an exponent
12
Repeated addition
Down
2
Steepness of a line
3
Exact correspondence on both sides
4
Part of a whole number
9
Line touching circle at one point
10
Distance from center to edge of circle
11
The number representing nothing
13
Proven mathematical statement