A runner laps the field — add up every side to set the full lap distance around the rectangle.
A runner laps a rectangular field, and the child adds up every side to set the full distance around it — or works a missing side from the perimeter. Summing the sides builds perimeter as total boundary length. Best for Grades 3–5.
A free, no-signup, no-ads math game for Grades 3–5 — practising perimeter, rectangles, add-sides, missing-side, measurement. Play in your browser on the KidsDoMath games hub or explore more Measurement games.
More like this: Liquid Lab · Area Avenue · Balance Bay.