Across
1
Split into equal parts
4
Comparison of two quantities
5
Symbol representing unknown value
7
Mathematical statement of equality
9
Rectangle with four equal sides
10
Longest side of a right triangle
Down
2
Amount of space an object occupies
3
Sum divided by count
6
Repeated addition
8
Reference line in a graph
11
Divisible by two
12
Exact correspondence on both sides
13
Number divisible only by 1 and itself