Across
1
Mathematical statement of equality
5
Number divisible only by 1 and itself
6
Reference line in a graph
7
Line crossing from corner to corner
9
Part of a circle's circumference
12
Corner point of a polygon
13
Mathematical rule or equation
14
Parts per hundred
Down
2
U-shaped curve of a quadratic function
3
The number representing nothing
4
Result of raising a number to an exponent
8
Value that does not change
10
Repeated addition
11
Number with digits after a point
15
Split into equal parts