About This Lesson
<p>A napkin is folded so that a corner coincides with the midpoint of an opposite edge . Investigate the three triangles formed .</p>
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A very nice resource and a very nice way of introducing pupils to problem solving, investigating and making conjectures. I like the fact that you can also do some pythagoras and ratio work with this problem. In the teachers notes section, there are loads of ideas on how to teach this lesson, with extension ideas too.