<span>A line segment has (x1, y1)as one endpoint and (xm, ym)as its midpoint.
Use the formula? (x2, y2) = (2xm − x1, 2ym − y1)
to find the coordinates of the endpoint of a line segment if the coordinates of the other endpoint and midpoint are (1, 8), (−3, −1) and (−7, 16), (3, 6),respectively.
Given the original dimensions of: 2 1/2 ft, 3 ft and 1 1/2 After addition of 1/2 ft on both sides, the new dimensions will be: 3 1/2 ft, 4 ft, and 2 1/2 ft thus the volume of the the prism will be: Volume=length*width*height V=3 1/2×4×2 1/2 V=35 ft³