The following octagon is formed by removing four congruent triangles from a rectangle. what is the area of the rectangle?

the answer is 60 because you have to add up all the sides I also had this one and they are talking about the pre rectangle the one that is outlined in the dotted lines so you add up 2+2+2=6 then you add up 2+2+6=10 then you multiply 6*10=60 therefore your answer is 60