(Annesley College , Adelaide in South Australia) found it helpful to work with some graph paper to work out that 98 cm of rope would be needed.

and Alex Tomlinson (Age 10, Howe Green House School) also found working with a grid helpful. They said, "Although the mat measures 14cm we would have to divide it into 2cm squares. The rope would cover 7x7 squares each measuring 2cm. The rope would therefore have to be 7x7x2cm long which is 98cm. In the same way a 12cm square would be 6x6x2cm (72cm) and a 16cm square 8x8x2 (132cm)"