Across
1
System of ordered marks for measuring
5
Exact correspondence on both sides
6
Number divisible only by 1 and itself
8
U-shaped curve of a quadratic function
9
Space between two intersecting lines
Down
2
Number less than zero
3
Line touching circle at one point
4
Distance from center to edge of circle
5
Part of a line with two endpoints
7
Difference between highest and lowest values