Across
1
Parts per hundred
5
U-shaped curve of a quadratic function
6
System of ordered marks for measuring
7
Proven mathematical statement
10
Exact correspondence on both sides
11
Split into equal parts
12
Amount of space an object occupies
Down
2
Part of a line with two endpoints
3
Math using letters for unknown values
4
Value that does not change
6
Result of addition
8
Mathematical rule or equation
9
Number divisible only by 1 and itself