Across
1
Round shape with all points equidistant
4
Mathematical rule or equation
5
Part of a line with two endpoints
6
Space between two intersecting lines
11
Symbol representing unknown value
14
Closed shape with straight sides
15
Visual representation of data
Down
2
Single numeral from 0 to 9
3
Line crossing from corner to corner
7
Line segment connecting two circle points
8
Parts per hundred
9
Line touching circle at one point
10
Mathematical statement of equality
12
Amount of space an object occupies
13
The number representing nothing