CPM Homework Help : INT1 Problem 7-51

Multiple Choice: The point $A(–2, 5)$ is rotated $90º$ counterclockwise ( $↺$ ) about the origin. What are the new coordinates of point $A^\prime$ ?

$(2, 5)$

$(5, –2)$

$(2, –5)$

$(–5, –2)$

Hint:

When you rotate counterclockwise $(x, y) → (−y, x)$ .

Answer:

(d)

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