don steward
mathematics teaching 10 ~ 16

Thursday, 20 October 2016

triangles cut into triangles

the main purpose of this work is to focus on triangle areas
there are various possible spin-offs:
  • perpendicular lines
  • surds
  • length and area ratios of similar shapes

directions for the task below

questions for the triangles above

the team at Puntmat (@puntmat) have found 8 ways (so far) to cut up a 3 by 6 right triangle into thirds:

their post on fractions of geometrical shapes contains many good exercises

many thanks to them

dividing unequally:

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