Robuta

https://www.open.edu/openlearncreate/mod/book/view.php?id=221686&chapterid=33845 OLCreate: Shape, space and measures: Area of a square or rectangle | OLCreate shape space and measures https://www.open.edu/openlearncreate/mod/book/view.php?id=222050&chapterid=33867 OLCreate: Shape, space and measures: Regular and irregular polygons | OLCreate shape space and measures regular irregular polygons