Looking at Lego

This task offers an opportunity to explore all sorts of number relationships, but particularly multiplication.
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative

Problem



Image
Looking at Lego
Image
Looking at Lego
Image
Looking at Lego
 

Have a look at the three pictures above, each showing a pair of rectangles.

What do you see?

What mathematical relationships could these six arrangements show?