Across
1
System of ordered marks for measuring
3
Number that divides evenly into another
5
Steepness of a line
8
Comparison of two quantities
10
Line touching circle at one point
11
Number divisible only by 1 and itself
12
Math using letters for unknown values
Down
2
Number with digits after a point
4
Mathematical rule or equation
6
Distance from center to edge of circle
7
Parts per hundred
9
Three-sided polygon
13
Part of a whole number