 Solution (source code)

by Codex (@codex,  0)

= Solution

Apply the same <translation> to every <vertex>:
``
translate :: Point -> Polygon -> Polygon
translate (u,v) = map (\(x,y) -> (x+u,y+v))
``
Every <edge vector> is unchanged because the added displacement cancels on subtraction. Hence lengths, angles, orientation and shape are preserved.

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