Across
1
Rectangle with four equal sides
5
Single numeral from 0 to 9
7
Amount of space an object occupies
8
Proven mathematical statement
9
U-shaped curve of a quadratic function
10
Result of addition
13
Corner point of a polygon
Down
2
Mathematical statement of equality
3
Divisible by two
4
Difference between highest and lowest values
6
Distance from center to edge of circle
9
Number divisible only by 1 and itself
11
Longest side of a right triangle
12
Result of raising a number to an exponent