A Trillion Triangles

Price $25 (including postage)  NEW BOOK


The book explains trigonometry in a simple way beginning with squares and square roots and Pythagoras Theorem up to solution of trig equations. It is aimed at the child and forms a complete and self-contained introduction to the subject. Suitable for children around grade 7. This is a new and very easy approach to trigonometry that begins with triples like 3,4,5 which the children make themselves from thin card and then use in various ways.


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