What is a polygon? Question content area bottom Part 1 Choose the correct answer below. A. A polygon is any closed shape in the plane formed by three line segments that intersect only at their endpoints. B. A polygon is any closed shape in the plane formed by four line segments that intersect only at their endpoints. C. A polygon is any closed shape in the plane whose sides are all the same length and whose angles all have the same measure. D. A polygon is any closed shape in the plane formed by three or more line segments that intersect only at their endpoints