Across
1
Longest side of a right triangle
8
Parts per hundred
9
Mathematical rule or equation
11
Lines that never intersect
Down
2
Round shape with all points equidistant
3
Three-sided polygon
4
Result of multiplication
5
Number divisible only by 1 and itself
6
Number less than zero
7
Steepness of a line
10
Line segment connecting two circle points
12
Rectangle with four equal sides