Question

complete the sentence.
the intersection of a regular pentagon and a line segment can be ______.
a line \t\t a ray
two triangles \t two points

Explanation:

A regular pentagon is a closed polygon with 5 sides. A line segment is a part of a line with two endpoints. The intersection of a regular pentagon (a closed figure) and a line segment can't be a line (infinite, no endpoints) or a ray (infinite in one direction) as the pentagon is closed and the segment is finite. It also can't be two triangles (the intersection of a polygon and a segment is a set of points, not polygons). The intersection can be two points (e.g., when the segment crosses two sides of the pentagon).

Answer:

D. two points