Across
1
Closed shape with straight sides
3
Line touching circle at one point
4
Round shape with all points equidistant
5
Power to which a number is raised
9
Line segment connecting two circle points
10
Collection of distinct elements
Down
2
Mathematical statement of equality
3
Proven mathematical statement
6
Lines that never intersect
7
Difference between highest and lowest values
8
U-shaped curve of a quadratic function
11
Corner point of a polygon
12
Divisible by two
13
Longest side of a right triangle