Across
1
Mathematical statement of equality
6
Total distance around a shape
7
Mathematical rule or equation
10
Middle value in an ordered dataset
15
Reference line in a graph
Down
2
Single numeral from 0 to 9
3
Math using letters for unknown values
4
Amount of space an object occupies
5
Part of a line with two endpoints
8
Round shape with all points equidistant
9
Closed shape with straight sides
11
Result of addition
12
Three-sided polygon
13
Rectangular array of numbers
14
Steepness of a line