21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
16 trunks form a cube (Wilderness...
16 trunks form a cube (Wilderness...
16 trunks form a cube (Wilderness...