Rotating by 90 ° in an anticlockwise direction about the origin
In the diagram below, triangle \(ABC\) is rotated 90 ° in an anticlockwise direction about the origin:
\(A(4, 4) \rightarrow A^\prime (–4, 4); B(3, 6) \rightarrow B^\prime (–6, 3); C(5, 7) \rightarrow \)
\((–7, 5)\).
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