Explore perimeter by trying this interactive program. Make sure you click Hide Totals and Hide Perimeter before you start.
https://toytheater.com/area-perimeter-explorer/
Explore area by trying this interactive program. Make sure you click Hide Totals and Hide Area before you start.
Create your own shapes and work out the area in cm2.
https://www.mathed.page/geoboard/grid-paper/
Explore area and perimeter by trying this interactive program. Make sure you click Hide Totals and Hide Perimeter before you start and make sure you use the same colour for your shape.