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Trapezoid

The diagonal lengths of a trapezoid are given by:Example of a trapezoid with diagonals, angles and side lengths


d_1=sqrt{a^2+b^2-2*a*b*cos(B)}

d_1=sqrt{c^2+d^2-2*c*d*cos(D)}

d_2=sqrt{a^2+d^2-2*a*d*cos(A)}

d_2=sqrt{b^2+c^2-2*b*c*cos(C)}