Visually illustrates that for a point inside an equilateral triangle, the sum of the perpendiculars from that point to the sides of the triangle equals the altitude of the triangle.
The VITALmaths and VITALmathsLIC site consists of a databank of short and funky video clips that
specifically interrogate the conceptual aspects of a mathematical idea, process or concept. Some of the video
clips contain strategic dialogues to encourage appropriate mathematical talk and conversation.
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SANDBOXmaths
SANDBOXmaths is a collection of more experimental video clips done by students in their mathematics
teacher-training classes and researchers wishing to use specific video clips in their teaching and research.