Frame the Mosaic
Build each of the four sides of the frame with tiles so it measures exactly the length written on it — then all four sides light up the picture.
🎯 Every side's tiles add up to exactly its target length (mind the units!).
✓ Solved!
Perimeter is the distance all the way round the edge. Each side shows a
target length. Lay tiles until a side adds up to exactly that — remember
1 m = 100 cm, so a 1 m plank is worth ten 10 cm bars.
Tap a placed tile to remove it. The side-totals stay hidden until you press Check,
so the adding-up is yours to do.
← Back to M3.1 Perimeter & unit conversion