Across
1
Exact correspondence on both sides
5
Total distance around a shape
7
Sum divided by count
8
Divisible by two
Down
1
System of ordered marks for measuring
2
Mathematical rule or equation
3
Amount of space an object occupies
4
Number divisible only by 1 and itself
6
Longest side of a right triangle
9
Space between two intersecting lines
10
Round shape with all points equidistant