Which shows the correct use of partial products to multiply 54 x 4

What is the greatest common factor of 8 and 36

You are assembling pieces of an iron gate to complete a fence. the finished gate will look like the one below. in order to assemble the gate it is important to under how the pieces are related. part 1: how are pies 1 and 2 in the archway related? part 2: how are the rectangular sections 5 and 6 in the center of the gate related to each other?

Which geometric principle is used to justify the construction below?