Across
1
Rectangular array of numbers
3
Longest side of a right triangle
4
Lines that never intersect
5
Distance from center to edge of circle
7
Corner point of a polygon
8
Number divisible only by 1 and itself
Down
2
Line crossing from corner to corner
6
Three-sided polygon
9
System of ordered marks for measuring
10
Steepness of a line
11
Line segment connecting two circle points
12
Mathematical statement of equality