Across
1
Line crossing from corner to corner
5
Divisible by two
6
Total distance around a shape
7
Number with digits after a point
11
Lines that never intersect
13
Collection of distinct elements
14
Symbol representing unknown value
Down
2
Repeated addition
3
Round shape with all points equidistant
4
Longest side of a right triangle
8
Proven mathematical statement
9
Line touching circle at one point
10
Split into equal parts
11
Closed shape with straight sides
12
Corner point of a polygon