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precalculus

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show that (-1,1), (9,4), (20,6) and (10,1) are the vertices of a rhombus and then find the area of this rhombus?

  • precalculus -

    no they are not

    just sketch it and find the slopes of the lines, none are equal

    In a rhombus opposite sides should have the same slope and they must be equal in length.

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