Across
1
Space between two intersecting lines
4
Parts per hundred
5
Amount of space an object occupies
6
Result of addition
7
Symbol representing unknown value
12
Longest side of a right triangle
13
Divisible by two
Down
2
Three-sided polygon
3
Proven mathematical statement
8
Part of a line with two endpoints
9
Round shape with all points equidistant
10
Number greater than zero
11
The number representing nothing
14
Lines that never intersect