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geometry

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a rhombus has an area of 165 square units. Of the lenght of one of its diagonals is 15 units, find the lenght of its other diagonal

I tried DR Russ
I didn't come up with answer of 22 units
could you give more direction

  • geometry -

    Think of the rhombus as a rectangle where the lines joining the mid-points are the diagonals of the rhombus.

    The area of a rhombus is therefore half of product of its diagonals.
    So 15*D/2=165.
    Solve for D.

  • geometry -

    A Area

    AC and BD diagonals

    A=AC*BD/2

    165=15*BD/2

    2*165=15*BD

    330=15*BD Divide with 15

    BD=330/15=22


    go to wikipedia and type rhombus

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