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

User Tovare
by
6.8k points

1 Answer

5 votes

Answer:

(18, - 9 )

Explanation:

Under a counterclockwise rotation about the origin of 90°

a point (x, y ) → (- y, x ), thus

A(- 9, - 18 ) → (18, - 9 )

User Andrei Kamenskikh
by
6.5k points
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