Across
1
Rectangular array of numbers
3
Steepness of a line
4
Symbol representing unknown value
5
Distance from center to edge of circle
7
Mathematical statement of equality
11
Three-sided polygon
Down
1
Middle value in an ordered dataset
2
Line crossing from corner to corner
6
Corner point of a polygon
8
Split into equal parts
9
Number divisible only by 1 and itself
10
Collection of distinct elements