Across
1
Amount of space an object occupies
3
Exact correspondence on both sides
5
Part of a circle's circumference
6
Lines that never intersect
7
Round shape with all points equidistant
8
Difference between highest and lowest values
9
Part of a whole number
11
Result of raising a number to an exponent
Down
1
Symbol representing unknown value
2
Middle value in an ordered dataset
3
Rectangle with four equal sides
4
Repeated addition
6
Parts per hundred
10
Line touching circle at one point