Across
1
Sum divided by count
5
Split into equal parts
6
Number that divides evenly into another
7
Number less than zero
9
System of ordered marks for measuring
12
Part of a circle's circumference
14
Number divisible only by 1 and itself
Down
2
U-shaped curve of a quadratic function
3
The number representing nothing
4
Total distance around a shape
8
Symbol representing unknown value
10
Round shape with all points equidistant
11
Difference between highest and lowest values
13
Mathematical rule or equation