Across
1
Line segment connecting two circle points
4
Math using letters for unknown values
5
Number less than zero
6
Mathematical rule or equation
11
Single numeral from 0 to 9
Down
2
Symbol representing unknown value
3
Number with digits after a point
7
Line crossing from corner to corner
8
Result of raising a number to an exponent
9
U-shaped curve of a quadratic function
10
Round shape with all points equidistant