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Arrange these shapes in order of size. Put the smallest first.

seven irregular shapes
You might like to use this interactivity to try out your ideas:

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Once you've had a chance to think about it, click below to see how four different pupils began working on the task.

Kelsey said:

"I printed the shapes and then measured the length of each shape at the longest point." 

Louise and Rosie said:

"We observed the area of each and tried to rearrange the shapes in our heads to compare them." 

Thomas said:

"I cut out the shapes then cut each up into little pieces and laid them on top of each other to see which was bigger. I also put them on a grid with small squares and counted the number of squares for each." 

Can you take each of these starting ideas and develop it into a solution?