Laurel12 Laurel12
  • 18-06-2016
  • Mathematics
contestada

The plate is rotated 90° about the origin in the counterclockwise direction. In the rotated trapezoid, what are the coordinates of the endpoints of the side congruent to side GH?

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mathmate
mathmate mathmate
  • 19-06-2016
Use (x,y) -> (-y,x)  for rotation (CCW) about the origin.
No graph, so cannot give more details.
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