3 years ago

1

Mathematics

1 answer:

Yakvenalex [24]3 years ago

5 0

Answer:

(2, - 1 )

Step-by-step explanation:

Under a counterclockwise rotation about the origin of 90°

a point (x, y ) → (- y, x ) , thus

O(- 1, - 2 ) → (2, - 1 )

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