# Top Ten: Geometry instruments

The definitive chart of the best tools

This issue, Top Ten features the top ten geometry instruments! Then vote here on the top ten mathematical celebration days for Issue 07!

At 10 this week, no-one’s favourite member of the Oxford geometry set: the 30° set square.

At 9, and mightier than the swordcil: the pencil.

At 8, and vastly superior to the circular protractor, because no-one ever needs to measure reflex angles: the semicircular protractor.

At 7, it’s the perfect tool for those who are overconfident (or trying to annoy their maths teacher): the pen.

Down two places to 6, it’s a surveyor’s favourite* tool: a theolodite.

*source: a focus group of surveyors.

Bursting back into the charts at 5, due to its newly-found fame in The Emoji Movie: the 45° set square.

At 7, it’s the perfect tool for those who are overconfident (or trying to annoy their maths teacher): the pen.

At 3, something you can use to make this white space fill up: your imagination.

At 2, perfect for drawing a circle or locating north twice: a pair of compasses.

If you don’t know what GeoGebra is, then stop reading now, go download it and play. Luckily this is the last sentence in this issue’s Top Ten, so you were finished anyway…

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