Across
1
Closed shape with straight sides
3
Distance from center to edge of circle
4
Single numeral from 0 to 9
5
Corner point of a polygon
6
Difference between highest and lowest values
7
Rectangular array of numbers
11
Result of raising a number to an exponent
12
Value that does not change
13
Space between two intersecting lines
Down
2
Power to which a number is raised
3
Comparison of two quantities
8
Steepness of a line
9
Part of a line with two endpoints
10
Mathematical statement of equality