Across
1
Parts per hundred
4
Part of a circle's circumference
5
Line segment connecting two circle points
7
Space between two intersecting lines
9
Value that does not change
13
Proven mathematical statement
14
Amount of space an object occupies
15
Round shape with all points equidistant
Down
2
Mathematical rule or equation
3
Split into equal parts
6
Mathematical statement of equality
8
Longest side of a right triangle
10
Result of raising a number to an exponent
11
Lines that never intersect
12
System of ordered marks for measuring