Across
1
Line segment connecting two circle points
4
Closed shape with straight sides
5
Part of a line with two endpoints
6
Part of a circle's circumference
10
U-shaped curve of a quadratic function
11
Line crossing from corner to corner
12
Number divisible only by 1 and itself
Down
2
Comparison of two quantities
3
Parts per hundred
4
Total distance around a shape
7
Number less than zero
8
Corner point of a polygon
9
Split into equal parts