Across
1
Space between two intersecting lines
2
Closed shape with straight sides
4
Three-sided polygon
5
Exact correspondence on both sides
7
Corner point of a polygon
8
Part of a whole number
Down
2
Result of raising a number to an exponent
3
Longest side of a right triangle
6
Part of a circle's circumference
9
Round shape with all points equidistant
10
Part of a line with two endpoints
11
Line segment connecting two circle points