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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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5 votes
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?

User Retrodrone
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8.1k points

1 Answer

4 votes
Use (x,y) -> (-y,x) for rotation (CCW) about the origin.
No graph, so cannot give more details.
User Ramesh Navi
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8.2k points
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