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What are the coordinates of point B' after triangle ABC is reflected across the y-axis

What are the coordinates of point B' after triangle ABC is reflected across the y-example-1

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ANSWER :

(-3, 2)

EXPLANATION :

Note that the coordinates when reflecting an image across the y-axis will be :


(x,y)\rightarrow(-x,y)

The sign of the x coordinate will change.

From the problem, the coordinates of B is (3, 2)

The coordinates of it after reflecting across the y-axis will be :


(3,2)\rightarrow(-3,2)

The answer is (-3, 2)

User Mahmudur
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