If 2 rectangles have the same perimeter do they have to he congruent

Hey there!

Your answer is no.

I'll give an example to prove this wrong for you.

We have one rectangle with the dimensions of 2 x 6 units and another rectangle with dimentions of 4 x 4 units.

The perimiter of the first one is 16 because the four sides added up is 16: 2 + 2 + 6 + 6 = 16

The perimiter of the second is also 16. 4 + 4 + 4 + 4 = 16

So, they both have the same perimeter, but they are not congruent because their sides are different lengths.

Hope this helps!