Recall that the perimeter of a polygon is the sum of the lengths of the polygon's sides. You can
use the Distance Formula to find perimeters of polygons in a coordinate plane.
Follow these steps to find the perimeter of a pentagon with vertices A(-1, 4), B(4,4), C(3,-2),
D(-1,-4), and E(-4, 1). Round to the nearest tenth.
A Plot the points. Then use a straightedge to draw the pentagon that is
determined by the points.