Across
1
Part of a circle's circumference
3
Corner point of a polygon
4
Three-sided polygon
6
Single numeral from 0 to 9
7
Mathematical rule or equation
9
Line segment connecting two circle points
10
Rectangle with four equal sides
Down
2
Number that divides evenly into another
5
Divisible by two
6
Line crossing from corner to corner
8
Result of raising a number to an exponent
11
Part of a whole number