Question 176051
in order for this to be a true rectangle 
sum of the squares of each side, must equal the diagonal squared.
:
so 
{{{18^2+36^2=43^2}}}has to be a true statement
:
{{{324+1296=1849}}}
:
{{{1620=1849}}}
:
this is not a true statement therefore this is not a true rectangle