Across
1
Corner point of a polygon
3
Result of raising a number to an exponent
4
Three-sided polygon
5
Distance from center to edge of circle
6
Result of multiplication
8
Rectangular array of numbers
9
Part of a line with two endpoints
11
Line touching circle at one point
Down
2
Number with digits after a point
3
Parts per hundred
7
Space between two intersecting lines
10
Proven mathematical statement
12
Rectangle with four equal sides