Exploring Angles within a Triangle - Maths Interactives

http://www.learnalberta.ca/content/mejhm/index.html?l=0&ID1=AB.MATH.JR.SHAP&ID2=AB.MATH.JR.SHAP.ANG&lesson=html/video_interactives/angles/anglesInteractive.html

Manipulative, Video

Use dynamic geometry to explore the angle sum of a triangle, by constructing  triangles of various sizes.  The correspondence to the straight angle sum is shown. In addition, a video shows how triangles are used in building bikes and choosing bike sizes.

8 November 2014 Edit: 27 January 2018

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