Across
1
Longest side of a right triangle
5
Line crossing from corner to corner
7
Distance from center to edge of circle
11
Part of a whole number
12
Number less than zero
Down
2
U-shaped curve of a quadratic function
3
Value that does not change
4
Closed shape with straight sides
6
Result of addition
8
Number greater than zero
9
Collection of distinct elements
10
Three-sided polygon