Across
1
Longest side of a right triangle
6
Closed shape with straight sides
8
System of ordered marks for measuring
9
Symbol representing unknown value
11
Power to which a number is raised
12
Math using letters for unknown values
13
Difference between highest and lowest values
Down
2
Distance from center to edge of circle
3
Line segment connecting two circle points
4
Number greater than zero
5
Value that does not change
7
Three-sided polygon
10
Steepness of a line
14
Rectangular array of numbers