Across
1
Steepness of a line
2
Rectangular array of numbers
4
Total distance around a shape
6
Part of a circle's circumference
7
Longest side of a right triangle
8
Math using letters for unknown values
10
Number that divides evenly into another
13
Part of a line with two endpoints
Down
1
System of ordered marks for measuring
3
Rectangle with four equal sides
4
Closed shape with straight sides
5
Round shape with all points equidistant
9
Proven mathematical statement
11
Line touching circle at one point
12
Distance from center to edge of circle