I was so inspired by @MrNiksMathClass square counting activity in the shape of a shark, that I decided to create my own. Each class I have used this with have loved it and learnt about like terms and square numbers.
My shape is a Stegasaurus which I have made from rhombi, so I have renamed it “Rhombisaurus”. I wonder if my students will spot the triangular numbers?
A PDF file for this worksheet and solution can be downloaded here: Rhombisaurus.