Across
1
U-shaped curve of a quadratic function
2
Collection of distinct elements
6
Part of a line with two endpoints
7
Number greater than zero
8
Number with digits after a point
9
Longest side of a right triangle
12
Mathematical rule or equation
Down
2
System of ordered marks for measuring
3
Part of a circle's circumference
4
Difference between highest and lowest values
5
Value that does not change
10
Single numeral from 0 to 9
11
Distance from center to edge of circle
13
Three-sided polygon