https://postimg.cc/image/5c3ntvufx/
I made a mistake but I can't find it.
https://postimg.cc/image/5c3ntvufx/
I made a mistake but I can't find it.
Many Thanks.
Will I use the same method in that one?
https://postimg.org/image/9tjy9e7w3/
Yes, that works. However, the problem statement is confusing. You wrote "[the] lengths of the diagonals of the rectangle ABCD is 10." I think what you meant is this: "The sum of the lengths of the diagonals of the quadrilateral ABCD is 10" - correct?