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The sides of a parallelogram are 15 ft and 17 ft. One angle is 40° while another angle is 140°. Find the lengths of the diagonals of the parallelogram (to the nearest tenth of a foot)

  • math -

    for the long diagonal
    LD^2 = 15^2 + 17^2 - 2(15)(17)cos140°

    solve for LD

    let me know what your equation is for the short diagonal.

  • math -

    one side of a parallelogram is 10 inches long and makes angle 45 and 60 with short diagonal and the other side respectively. Find the length of the other side.?

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