Across
1
Line crossing from corner to corner
3
Proven mathematical statement
6
Result of addition
7
Total distance around a shape
8
Reference line in a graph
9
Corner point of a polygon
10
Longest side of a right triangle
12
Symbol representing unknown value
Down
1
Single numeral from 0 to 9
2
Result of raising a number to an exponent
4
Number with digits after a point
5
Power to which a number is raised
11
Line segment connecting two circle points