Across
1
Line touching circle at one point
4
Part of a circle's circumference
5
Steepness of a line
7
U-shaped curve of a quadratic function
8
Closed shape with straight sides
9
Line segment connecting two circle points
12
Corner point of a polygon
Down
1
Three-sided polygon
2
Amount of space an object occupies
3
Value that does not change
6
Number with digits after a point
10
Middle value in an ordered dataset
11
Line crossing from corner to corner