3 years ago

What is point A (-9, -18) rotated 90° counterclockwise?

Mathematics

1 answer:

DedPeter [7]3 years ago

7 0

Answer:

(18, - 9 )

Step-by-step explanation:

Under a counterclockwise rotation about the origin of 90°

a point (x, y ) → (- y, x ), thus

A(- 9, - 18 ) → (18, - 9 )

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