Across
1
Single numeral from 0 to 9
3
Parts per hundred
4
Result of raising a number to an exponent
6
Repeated addition
7
Middle value in an ordered dataset
8
Mathematical statement of equality
9
Rectangle with four equal sides
11
Proven mathematical statement
13
U-shaped curve of a quadratic function
Down
1
Line crossing from corner to corner
2
Power to which a number is raised
5
Three-sided polygon
10
Part of a circle's circumference
12
Distance from center to edge of circle