Across
1
Math using letters for unknown values
5
Difference between highest and lowest values
6
Power to which a number is raised
8
Distance from center to edge of circle
11
Lines that never intersect
12
System of ordered marks for measuring
Down
2
Longest side of a right triangle
3
Number divisible only by 1 and itself
4
U-shaped curve of a quadratic function
7
Parts per hundred
9
Three-sided polygon
10
Round shape with all points equidistant
13
Part of a line with two endpoints