Across
1
Rectangular array of numbers
5
Line touching circle at one point
6
Amount of space an object occupies
8
Lines that never intersect
10
Total distance around a shape
11
Steepness of a line
12
Math using letters for unknown values
Down
2
Number divisible only by 1 and itself
3
Repeated addition
4
Mathematical statement of equality
7
Value that does not change
8
Result of multiplication
9
Divisible by two
13
Split into equal parts