Jenniferwolf
31.08.2019 •
Mathematics
What is point a (-9, -18) rotated 90° counterclockwise?
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Ответ:
(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 )
Ответ:
The submarine needs to move up, so the rate the submarine needs to move is positive.
Step-by-step explanation: