

The diagonals of a quadrilateral ABCD where angle ADC=θ, side AB=a, BC=b, CD=c, and DA=d



The diagonals of a quadrilateral ABCD where the coordinates of the vertices are known



The diagonals of a quadrilateral ABCD where angle ADC=θ, angle BCD=φ, side AB=a, BC=b,and CD=c



The diagonals of a quadrilateral ABCD where angle ADC=θ, angle BCD=φ, angle ABC=ψ, side AB=a, and side BC=b



The equations of the diagonals of a quadrilateral ABCD where the equations of the lines AB, BC, CD, and DA are known



