Check the picture below.
notice, we have three pair of sides, let's add them all up to get the area

I think it is scend choose
The question asks for the length of CD and HJ. To find those, we need to find a connection between them.
In the given statement, it says ABCD ≅ FGHJ. When we look at the equation, the corresponding letters are equal. For example, angle A is congruent to Angle F. Or BC ≅ GH.
So we know that CD and HJ are congruent.
Set them equal:

Subtract 2x from both sides:

Subtract 2 from both sides:

If x is 3, plug it in:

Simplify:

So, HJ is 11. And because HJ ≅ CD, CD is 11 too.
24 puzzles in all.
Hope this helps:)
A grid system or an absolute location