Across
1
Line touching circle at one point
4
Result of addition
6
Result of raising a number to an exponent
9
System of ordered marks for measuring
10
Sum divided by count
12
Exact correspondence on both sides
Down
2
Rectangular array of numbers
3
Space between two intersecting lines
5
Part of a line with two endpoints
6
Number divisible only by 1 and itself
7
Three-sided polygon
8
Value that does not change
11
Distance from center to edge of circle
13
Amount of space an object occupies