Jernel has to figure out the area of her square garage. she knows that one side of the garage is equal to the length of her rabbit pen. the dimensions of the rectangular rabbit pen are 19 by 10

what is the area of the garage?

Which is the pen and which is the rabbit dimention? i promise i will answer if you clarify on this

It is a square so all sides are the same length. The pen is 19 by 10 and normally the length is given first.

Tip---in word problems the word "is" always means "equals"

In this case "one side of the garage IS equal to the length of her rabbit pen."