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Math
Geometry
Congruence and Triangles
Basic Transformations
Reflection over a Line

Practice problem

Reflection over a Line

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Contributors

Christine
Victor Wang

A triangle and its mirror image (over a hidden line) are shown.

Find the line of reflection between the two triangles above.

Choose one answer

Option A: A

$y=x$

Option B: B

$y=x-9$

Option C: C

$y=x+9$

Option D: D

$y=2x+9$

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