Across
1
Proven mathematical statement
5
Result of raising a number to an exponent
6
Single numeral from 0 to 9
7
Round shape with all points equidistant
9
Closed shape with straight sides
10
Middle value in an ordered dataset
11
Repeated addition
12
Lines that never intersect
Down
2
System of ordered marks for measuring
3
Number less than zero
4
Part of a line with two endpoints
8
Line crossing from corner to corner
9
U-shaped curve of a quadratic function