Across
1
Part of a whole number
2
System of ordered marks for measuring
6
Mathematical rule or equation
7
Total distance around a shape
9
U-shaped curve of a quadratic function
10
Mathematical statement of equality
11
Amount of space an object occupies
Down
2
Exact correspondence on both sides
3
Line crossing from corner to corner
4
Value that does not change
5
Longest side of a right triangle
8
Repeated addition