Across
1
U-shaped curve of a quadratic function
3
Divisible by two
4
Steepness of a line
7
Part of a whole number
8
Three-sided polygon
9
Result of addition
Down
1
Number greater than zero
2
Amount of space an object occupies
5
The number representing nothing
6
Line touching circle at one point
10
Rectangle with four equal sides
11
Part of a line with two endpoints