Perimeters of arcs and sectors

PowerPoint here.

I’m kinda on a roll. Not sure how I feel about this one, though. Maybe too close to the last two that I’ve done (in activity terms). Could do with a little more interest in there.

I’ve also made some lovely sectors questions (first pic above) but I’m not sure exactly how they fit into the lesson. There’s a big lesson about using the formula and then some questions at the end where you don’t really need it. Hmmmm. They’re nice questions, though.

Also I think I should have included more questions on half circles and quarter circles. Or shunted some into the circumference PowerPoint. Might have a think about that.