Across
1
Closed shape with straight sides
2
Part of a circle's circumference
5
Total distance around a shape
6
Proven mathematical statement
7
Longest side of a right triangle
9
Number that divides evenly into another
10
Corner point of a polygon
12
Space between two intersecting lines
Down
2
Sum divided by count
3
Divisible by two
4
Mathematical rule or equation
5
Result of raising a number to an exponent
8
Part of a line with two endpoints
11
Parts per hundred