Across
1
Three-sided polygon
5
Exact correspondence on both sides
6
Steepness of a line
7
Math using letters for unknown values
8
Distance from center to edge of circle
Down
2
Number divisible only by 1 and itself
3
Result of raising a number to an exponent
4
System of ordered marks for measuring
7
Reference line in a graph
9
Round shape with all points equidistant
10
Lines that never intersect
11
Number greater than zero