The Paper Protractor!

Need to measure some common angles? Can't find your protractor?
Fret no more! For all your common angles, 15, 30, 45, 60, and 90 degrees, a handy protractor is just a square sheet of paper away.

[@carltonhighlightsandpodcas1050]

Wow this really helped a lot Thanks Kevin!!!

[@emilywang1396]

Thanks for this video, Kevin! It helped me with my school and now i give paper protractors to people who need them!!

[@videosbykevin2938]

You are most welcome, Emily. I'm delighted you found it useful.

[@craigbinder5560]

Utterly brilliant use of geometry

[@Archanajha.]

Thank you sir I understand

[@savanahwoolery8189]

thank you so much for helping me

[@videosbykevin2938]

You are most welcome

[@rashmigaur7133]

Thanks bro

[@debizamora8107]

this is the best protractor I have ever made and it is really easy

[@dilipchampaneria5810]

Very nice this is helpful in Maths

[@ssaybaa]

this help thanks kevin

[@videosbykevin2938]

You are most welcome.

[@Archanajha.]

Sir how to make a Pentagon of a square

[@videosbykevin2938]

Good day Archana, Here is a lovely tutorial on making a pentagon from a square: www.inthekitchenwithmum.com/2015/01/how-to-fold-an-origami-pentagon/

[@armylover-kb3kb]

Thanks

[@funnygappe9387]

Superb

[@greenaum]

You can check your paper really IS square by folding it diagonally from the corners and making sure the edges on both sides line up. So with that you can make a protractor from any old bit of paper. I was wondering how Pythagoras and the like did all their stuff without the advantage of modern manufacturing and I can imagine they'd work things like this out to create their own tools using principles of geometry, which would be clear to them cos they were geniuses who worked with angles all day. How to invent geometry from nothing! Or at least how to measure the geometry to make sure you've got it right...

[@prahaladbhuyan3006]

Sir how to make 72 degree on this process plz reply

[@videosbykevin2938]

The five central angles of a pentagon are 72°. To make a pentagon, I would point you toward this fine video by Tobias: kzbin.info/www/bejne/apytnn2LhruVhZI

[@tobyvogt8897]

Cool

[@alexmarcelo1739]

thanks i didn't know that a triangle is a protracter

[@doralopez1953]

Hi

[@videosbykevin2938]

Hello Dora.