Across
1
Line touching circle at one point
3
System of ordered marks for measuring
5
Distance from center to edge of circle
6
U-shaped curve of a quadratic function
7
Divisible by two
8
Difference between highest and lowest values
9
Number with digits after a point
10
Comparison of two quantities
Down
1
Three-sided polygon
2
The number representing nothing
3
Collection of distinct elements
4
Mathematical statement of equality
11
Space between two intersecting lines