Across
1
Corner point of a polygon
2
Number with digits after a point
3
U-shaped curve of a quadratic function
6
Three-sided polygon
9
System of ordered marks for measuring
Down
1
Symbol representing unknown value
2
Single numeral from 0 to 9
4
Round shape with all points equidistant
5
Difference between highest and lowest values
7
Value that does not change
8
Part of a whole number
10
Proven mathematical statement
11
Closed shape with straight sides
12
Result of multiplication