Copy of Counter-clockwise Rotation Exploration

[b]Counter-clockwise Rotation Exploration[/b][br][br]Drag the slider to watch triangle ABC rotate counter-clockwise.
[br]1) Record the coordinates for triangle ABC. [br][br]2) Rotate triangle ABC 90 degrees counter-clockwise (drag the red slider). Record the new coordinates. [br][br]3) Rotate the triangle ABC 180 degrees counter-clockwise. Record the new coordinates.
90 rotation
What happened to the x and y coordinates ? What happened to their signs?
180 rotation
What happened to the x and y coordinates? What happened to their signs?
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Information: Copy of Counter-clockwise Rotation Exploration