Across
1
Three-sided polygon
6
Sum divided by count
7
Mathematical rule or equation
9
Result of raising a number to an exponent
10
Comparison of two quantities
13
Split into equal parts
Down
2
Corner point of a polygon
3
Longest side of a right triangle
4
Rectangular array of numbers
5
Math using letters for unknown values
8
Value that does not change
11
Single numeral from 0 to 9
12
Part of a circle's circumference
14
Steepness of a line
15
Parts per hundred