Across
1
Line touching circle at one point
2
System of ordered marks for measuring
4
Sum divided by count
10
Part of a circle's circumference
11
Three-sided polygon
12
Part of a line with two endpoints
Down
2
Steepness of a line
3
Corner point of a polygon
5
Number less than zero
6
Number that divides evenly into another
7
Parts per hundred
8
Comparison of two quantities
9
Rectangle with four equal sides