Finding diagonal length of quadrilateral using ( for each number block )

[Eng_A.Abdelaty]

Finally

Finally, I have reached the correct mathematical solution.

And I assumed that y=x^2 and I solved it as a quadratic equation of the second degree to get y then x
find_diagonal_of_a_quadrilateral_copy.aia (99.9 KB)

There will be only two values ​​for the unknown diagonal .

thanks