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Listed under:  Mathematics  >  Geometry  >  Shapes (Geometry)
Video

MathXplosion, Ep 10: What is the strongest shape?

Are triangles really the strongest shapes ever? If so, why? Learn how and why right-angled and equilateral triangles have been used in engineering, architecture and design through the ages.

Video

Triangle Types

An interactive applet in which students classify triangles as isosceles, scalene and equilateral.