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Triangle ABC has vertices with coordinates A(2,3), B(7,8), and C(-4,6). The triangle is reflected about line L. The image points are A(2,-5), B'(7,-10), and C'(-4,-8). What is the equation of line L?

 Jun 18, 2020
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Graphing this, we find that Triangle ABC and its reflection are reflected horizontally. 

 

The line of reflection must be the midpoint of A and A'. The x point of A is 3 and the x point of A' is -5. The midpoint must be -1 then. The equation of Line L should be y= -1.

 

Correct me if I'm wrong.

 Jun 18, 2020

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