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Sagot :
Given: The coordinates of triangle ABC as
[tex]\begin{gathered} A=(1,-4) \\ B=(4,-5) \\ C=(6,-3) \end{gathered}[/tex]To Determine: The coordinates of triangle ABC after first reflect over the y-axis and then over the x-axis
Solution
The reflection over the y-axis rule is given as
[tex](x,y)\rightarrow(-x,y)[/tex]Let us apply the rule to the given triangle ABC
[tex]\begin{gathered} A(1,-4)\rightarrow A^{\prime}(-1,-4) \\ B(4,-5)\rightarrow B^{\prime}(-4,-5) \\ C(6,-3)\rightarrow(-6,-3) \end{gathered}[/tex]The reflection rule over the x-axis is given as
[tex](x,y)\rightarrow(x,-y)[/tex]Let us apply the rule to the given
[tex]\begin{gathered} A^{\prime}(-1,-4)\rightarrow A^{\prime}^{\prime}(-1,4) \\ B^{\prime}(-4,-5)\rightarrow B^{\prime}^{\prime}(-4,5) \\ C^{\prime}(-6,-3)\rightarrow C^{\prime}^{\prime}(-6,3) \end{gathered}[/tex]Hence, the new point of A'' = (-1, 4)
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