Across
1
System of ordered marks for measuring
4
Round shape with all points equidistant
5
Result of addition
7
Result of multiplication
8
Proven mathematical statement
10
Value that does not change
11
Three-sided polygon
Down
1
Steepness of a line
2
Distance from center to edge of circle
3
Longest side of a right triangle
6
Math using letters for unknown values
9
Number with digits after a point
12
Single numeral from 0 to 9