Across
1
Part of a circle's circumference
4
Repeated addition
7
Amount of space an object occupies
8
Value that does not change
Down
2
U-shaped curve of a quadratic function
3
Number that divides evenly into another
5
Number divisible only by 1 and itself
6
System of ordered marks for measuring
9
Closed shape with straight sides
10
Number less than zero