Across
1
Amount of space an object occupies
2
Steepness of a line
4
U-shaped curve of a quadratic function
5
Middle value in an ordered dataset
10
Value that does not change
12
Sum divided by count
Down
2
Part of a line with two endpoints
3
Line crossing from corner to corner
6
Math using letters for unknown values
7
Rectangle with four equal sides
8
Result of multiplication
9
System of ordered marks for measuring
11
The number representing nothing
13
Collection of distinct elements
14
Total distance around a shape