Across
1
Closed shape with straight sides
2
Collection of distinct elements
4
Lines that never intersect
5
Split into equal parts
6
Distance from center to edge of circle
7
U-shaped curve of a quadratic function
9
Divisible by two
Down
1
Number divisible only by 1 and itself
3
Line crossing from corner to corner
4
Result of multiplication
8
Result of raising a number to an exponent