A Brief History of Protractors

Protractors

Source: The National Museum of American History

Hope you enjoy these infographics, let me know in the comment bellow what other things you would like to see. Have a great day. You can find me on Facebook,  Tumblr,  Google+,  Twitter   and  Instagram. I will try to post there as often as possible.

Lots of love and don’t forget that maths is everywhere! Enjoy!

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