a chain weighing 5 ft/lb hangs vertically from a winch located 12 ft above the ground and the free end of the chain is just touching the ground. Find the work by the winch in pulling the whole chain

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .