Across
1
Part of a line with two endpoints
5
Round shape with all points equidistant
6
Corner point of a polygon
7
Line segment connecting two circle points
9
Value that does not change
11
Number that divides evenly into another
13
Repeated addition
15
Single numeral from 0 to 9
Down
2
Rectangular array of numbers
3
Result of raising a number to an exponent
4
System of ordered marks for measuring
8
Space between two intersecting lines
10
Total distance around a shape
12
Split into equal parts
14
Proven mathematical statement