Across
1
Number less than zero
5
Closed shape with straight sides
6
Math using letters for unknown values
7
Divisible by two
12
Longest side of a right triangle
Down
2
Three-sided polygon
3
System of ordered marks for measuring
4
Middle value in an ordered dataset
5
Result of raising a number to an exponent
8
Result of multiplication
9
Total distance around a shape
10
Number that divides evenly into another
11
Number with digits after a point