Across
1
Three-sided polygon
5
Mathematical rule or equation
6
Distance from center to edge of circle
7
Rectangle with four equal sides
11
Part of a line with two endpoints
Down
2
Symbol representing unknown value
3
Round shape with all points equidistant
4
Value that does not change
8
Result of addition
9
Amount of space an object occupies
10
Reference line in a graph
12
Line crossing from corner to corner