Across
1
Power to which a number is raised
5
Steepness of a line
7
Split into equal parts
9
Distance from center to edge of circle
10
Symbol representing unknown value
11
Result of raising a number to an exponent
12
Part of a line with two endpoints
13
Round shape with all points equidistant
Down
2
Number less than zero
3
Corner point of a polygon
4
Proven mathematical statement
6
Single numeral from 0 to 9
8
Number divisible only by 1 and itself