Across
1
Amount of space an object occupies
4
Number that divides evenly into another
5
Line crossing from corner to corner
6
Three-sided polygon
7
Result of addition
11
Steepness of a line
12
Round shape with all points equidistant
Down
2
System of ordered marks for measuring
3
Repeated addition
7
Rectangle with four equal sides
8
Line segment connecting two circle points
9
U-shaped curve of a quadratic function
10
Comparison of two quantities
13
Number divisible only by 1 and itself