Across
1
System of ordered marks for measuring
3
Single numeral from 0 to 9
4
Line touching circle at one point
5
Lines that never intersect
9
Amount of space an object occupies
11
Middle value in an ordered dataset
12
Longest side of a right triangle
Down
2
Number less than zero
6
Result of multiplication
7
Corner point of a polygon
8
Part of a line with two endpoints
10
Value that does not change
13
Symbol representing unknown value
14
Line crossing from corner to corner