Circle & Circumference
Circumference of these Circles
Circumference Sum of Touching Circles through a Line
worksheet
Squares on the Diagonal
Conference Paper
[size=85][url=https://www.eduhk.hk/primaryed/eproceedings/fullpaper/RN338.pdf]https://www.eduhk.hk/primaryed/eproceedings/fullpaper/RN338.pdf[/url][/size]
Lesson for Analysis
[size=85]https://youtu.be/yQUIsqRZ8Os[/size]