Across
1
Reference line in a graph
3
Corner point of a polygon
4
Distance from center to edge of circle
6
Math using letters for unknown values
8
Mathematical rule or equation
9
Mathematical statement of equality
12
Three-sided polygon
Down
2
Split into equal parts
3
Amount of space an object occupies
5
U-shaped curve of a quadratic function
7
Single numeral from 0 to 9
10
Line segment connecting two circle points
11
Result of multiplication
13
Rectangle with four equal sides