Across
1
Proven mathematical statement
4
Closed shape with straight sides
8
Steepness of a line
10
System of ordered marks for measuring
Down
2
Space between two intersecting lines
3
Number less than zero
5
U-shaped curve of a quadratic function
6
Result of addition
7
Repeated addition
9
Round shape with all points equidistant
11
Number divisible only by 1 and itself