Across
1
Mathematical statement of equality
5
Number with digits after a point
8
Number that divides evenly into another
9
Middle value in an ordered dataset
10
Longest side of a right triangle
Down
2
Math using letters for unknown values
3
Number less than zero
4
Closed shape with straight sides
6
Corner point of a polygon
7
Symbol representing unknown value
11
Steepness of a line
12
Three-sided polygon
13
Space between two intersecting lines