Across
1
Sum divided by count
6
Result of raising a number to an exponent
9
System of ordered marks for measuring
10
Closed shape with straight sides
11
Longest side of a right triangle
12
The number representing nothing
Down
2
Number that divides evenly into another
3
Comparison of two quantities
4
Line crossing from corner to corner
5
Round shape with all points equidistant
7
Divisible by two
8
Steepness of a line
10
Number divisible only by 1 and itself
13
Amount of space an object occupies