Question 1168091
.



1)    The perimeter of a trapezoid is the sum of lengths of its sides.



2)    Regarding your post,  I do not understand what is written in it.



      I would be happy to help,  but the meaning of these symbols is unclear to me.



      And I assume that it is unclear to any other tutor at this forum, too . . . 




If they are the lengths of the sides, then the post should say it . . . 


It should not keep it as unclassified secret . . .