Across
1
Mathematical rule or equation
4
Corner point of a polygon
5
Parts per hundred
8
Symbol representing unknown value
Down
2
Three-sided polygon
3
Number less than zero
6
System of ordered marks for measuring
7
Amount of space an object occupies
9
Value that does not change
10
Difference between highest and lowest values
11
Total distance around a shape
12
Space between two intersecting lines
13
Middle value in an ordered dataset