Unfolding 3D shapes

LI to unfold a 3D shape into a net.
LI to turn a 3D shape into a 2D shape.
This week for maths I learnt about nets, in maths terms a net is a 3D shape that has been unfolded. The task we had to do was unfold three 3D shapes, and for at least one of them we had to measure the length of its sides and use that to unfold it, but for the others we could just draw the outline. Once we'd drawn the outline we had to check and see if for the shape that was what it actually looked like unfolded.
I did this by imagining the shape unfolded, using a ruler to measure the lengths of the shape and also by tracing the shape that I was unfolding.