Across
1
Power to which a number is raised
6
Result of addition
7
Collection of distinct elements
8
Three-sided polygon
9
Closed shape with straight sides
10
Rectangular array of numbers
11
Amount of space an object occupies
12
Number less than zero
Down
2
Longest side of a right triangle
3
Number greater than zero
4
Number divisible only by 1 and itself
5
Part of a line with two endpoints
13
Space between two intersecting lines