Across
1
Part of a whole number
4
Sum divided by count
5
Corner point of a polygon
7
Repeated addition
8
Three-sided polygon
10
Space between two intersecting lines
11
Line crossing from corner to corner
13
Result of raising a number to an exponent
Down
2
Part of a circle's circumference
3
Line touching circle at one point
6
Collection of distinct elements
7
Middle value in an ordered dataset
9
U-shaped curve of a quadratic function
12
Split into equal parts