twice the height or

the distance round the circumference?

paper rulers work quite well for practical measuring

this version may need scaling

or use graph paper...

how many times do you think the diameter will wrap around the outside of a circle (the circumference)?

a geogebra applet that links diameter with circumference

several of these questions are adapted from KS3 SATs questions (England)

'satellite' is from a KS3 SAT paper

a similar question to 'rope around the Earth' appeared in William Whiston's book on the Elements of Euclid, dated 1702

he was an English theologian, historian and mathematician

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