Hi Nora,

In the future, please include the class name in the title (I edited it for now).

The key idea here is to remember the definitions of two words:

1. Perimeter, which is the length around a shape.
2. Parallelogram, which is a $4$-sided shape with opposite sides parallel. Because of this, parallelograms have a very useful property, which says that the opposite sides of parallelograms have the same length.

Keeping these two ideas in mind should help solve the problem!

Best,

John Lensmire
Areteem Staff