Across
1
Part of a line with two endpoints
5
Amount of space an object occupies
7
Line touching circle at one point
10
Three-sided polygon
11
Divisible by two
12
U-shaped curve of a quadratic function
Down
1
Result of addition
2
Middle value in an ordered dataset
3
Round shape with all points equidistant
4
Split into equal parts
6
Total distance around a shape
8
Part of a whole number
9
Number that divides evenly into another