Across
1
System of ordered marks for measuring
4
Rectangle with four equal sides
5
Amount of space an object occupies
8
U-shaped curve of a quadratic function
9
Line touching circle at one point
Down
2
Split into equal parts
3
Number that divides evenly into another
6
Number less than zero
7
Line crossing from corner to corner
9
Proven mathematical statement
10
Repeated addition