Across
1
Part of a circle's circumference
3
Number less than zero
4
Result of raising a number to an exponent
6
Reference line in a graph
7
Single numeral from 0 to 9
8
Amount of space an object occupies
11
Middle value in an ordered dataset
Down
2
Proven mathematical statement
5
Split into equal parts
9
Rectangle with four equal sides
10
Steepness of a line