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The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D?

  • geometry -

    all your x's will stay the same
    for D(3.6), D is 3 units above y = 3
    so the reflection in y = 3 would put it 3 units below,
    resulting in D1(3,0)

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