Across
1
Number that divides evenly into another
4
Space between two intersecting lines
5
Proven mathematical statement
6
Exact correspondence on both sides
7
System of ordered marks for measuring
9
Middle value in an ordered dataset
10
Line crossing from corner to corner
12
Closed shape with straight sides
13
U-shaped curve of a quadratic function
Down
2
Line segment connecting two circle points
3
Line touching circle at one point
7
Steepness of a line
8
Result of addition
9
Rectangular array of numbers
11
Part of a circle's circumference