Across
1
Longest side of a right triangle
5
Single numeral from 0 to 9
8
Result of raising a number to an exponent
11
Value that does not change
Down
2
Line segment connecting two circle points
3
Rectangular array of numbers
4
Result of multiplication
6
Exact correspondence on both sides
7
Line crossing from corner to corner
9
Middle value in an ordered dataset
10
Three-sided polygon