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Published on Sep 17, 2013
http://www.mathematicscentre.com/math... A child in Year 5/6 at Rangebank Primary School, Victoria, explains how to change a triangle into a rectangle. Can your students reconstruct the vital unspoken elements of the demonstration? Can your students extend the 'aha' moment implied by the video to discover how to calculate the area of triangle? The Investigation Guide at: http://www.mathematicscentre.com/math... might help. The mathematical content in the investigation is embodied in Task 187, Triangle Area, from the Mathematics Task Centre and Lesson 44, Area of a Triangle, from Maths300. The Maths300 lesson also supplies software.