Across
1
Number with digits after a point
3
Longest side of a right triangle
5
Round shape with all points equidistant
7
Repeated addition
9
Corner point of a polygon
11
Reference line in a graph
13
Closed shape with straight sides
Down
2
Middle value in an ordered dataset
4
Line crossing from corner to corner
6
Power to which a number is raised
8
Symbol representing unknown value
10
Rectangular array of numbers
12
Math using letters for unknown values