Across
1
Exact correspondence on both sides
2
Result of multiplication
4
Symbol representing unknown value
7
Corner point of a polygon
10
Amount of space an object occupies
13
Lines that never intersect
Down
2
U-shaped curve of a quadratic function
3
Result of raising a number to an exponent
5
Rectangular array of numbers
6
Reference line in a graph
8
Number divisible only by 1 and itself
9
Line crossing from corner to corner
11
Part of a circle's circumference
12
Repeated addition