Free maths resources from me, Craig Barton. I am the creator of mrbartonmaths.com & diagnosticquestions.com. I am also the TES Maths Adviser and the host of the Mr Barton Maths Podcast.
Last updated
14 August 2014
Share this A visual proof of why the angles in a triangle sum to 180 degrees.
Excellent review source.
Submit reply Cancel Very simple and a great visual resource - thank you!
Submit reply Cancel Simple and effective. Thank you
Submit reply Cancel Very nice, simple animated visual that you could talk and engage the class in to prove that interior angles of a triangle add up to 180 degrees.
Submit reply Cancel Fantastic ppt for my year 4. Saves me such a lot of time. Thanks
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