Across
1
U-shaped curve of a quadratic function
4
Collection of distinct elements
6
Three-sided polygon
7
Closed shape with straight sides
12
Exact correspondence on both sides
Down
2
Mathematical statement of equality
3
Line crossing from corner to corner
5
Math using letters for unknown values
7
Number divisible only by 1 and itself
8
Steepness of a line
9
Rectangle with four equal sides
10
Result of multiplication
11
Round shape with all points equidistant