Across
1
Math using letters for unknown values
6
Amount of space an object occupies
7
Result of addition
8
System of ordered marks for measuring
9
Line touching circle at one point
10
U-shaped curve of a quadratic function
Down
2
Rectangle with four equal sides
3
Visual representation of data
4
Mathematical rule or equation
5
Three-sided polygon
11
Divisible by two
12
Rectangular array of numbers