Pythagoras Theorem - How big is my TV Screen?

I think this is a really good idea, thanks!

Good graphics, but spelling errors everywhere in the notes.

Good approach for kids... Probably can be improved, but good start.

Good concept. It is a good place to start. I would tweek it a bit to use in my classroom.

Not too shabby--meaning very good. I like the real view approach because students ask 'what does this have to do in my real world?'