Across
1
Rectangular array of numbers
4
Number divisible only by 1 and itself
5
Three-sided polygon
10
Rectangle with four equal sides
11
Number with digits after a point
Down
2
System of ordered marks for measuring
3
Parts per hundred
6
Space between two intersecting lines
7
Sum divided by count
8
Repeated addition
9
Amount of space an object occupies
12
Part of a whole number
13
Total distance around a shape
14
Distance from center to edge of circle