Across
1
Three-sided polygon
5
Line crossing from corner to corner
6
Amount of space an object occupies
7
Value that does not change
8
Distance from center to edge of circle
9
Middle value in an ordered dataset
11
Parts per hundred
Down
1
Line touching circle at one point
2
Repeated addition
3
Proven mathematical statement
4
Longest side of a right triangle
10
Mathematical rule or equation