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Triangle A has points/coordinates of C(-2, 4), D(-3, 2), E(-1, 1). List the coordinates of the new image after Triangle A is reflected across the Y-axis.

User Mark Schill
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1 Answer

13 votes
13 votes

The coordinate points of the triangle are:


\begin{gathered} C\mleft(-2,4\mright) \\ D\mleft(-3,2\mright) \\ E\mleft(-1,1\mright) \end{gathered}

The graph of this original points is as follows:

Now, to make the reflection across the Y-axis, we follow this rule of transformation:


(x,y)\longrightarrow(-x,y)

so the points become the following:


\begin{gathered} C^(\prime)(2,4) \\ D^(\prime)(3,2) \\ E^(\prime)(1,1) \end{gathered}

Which, if we graph them, we get :

Answer:


\begin{gathered} C^(\prime)(2,4) \\ D^(\prime)(3,2) \\ E^(\prime)(1,1) \end{gathered}

Triangle A has points/coordinates of C(-2, 4), D(-3, 2), E(-1, 1). List the coordinates-example-1
Triangle A has points/coordinates of C(-2, 4), D(-3, 2), E(-1, 1). List the coordinates-example-2
User Lee Penkman
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3.2k points