Content atlas · skill

Find perimeters and unknown side lengths of polygons

The learner can find perimeters and unknown side lengths of polygons. This capability is distinct from mere exposure to or isolated use of length addition.

2 published problems

1. Fence the Wheat Farm — Plan a Minecraft wheat farm, mark its gate, and decide whether the available fence is enough.
2. Jules and the Crooked Shadow Screen — Move one square panel to straighten Jules’s shadow screen, then explain why its area stays put while its perimeter shrinks.