if you sum all the angles of all the faces this is called the total angle sum (the TAS)

it was explored by Descartes (who obtained Euler's rule for polyhedra (V + F = E + 2) quite a bit before Euler)

this exploration was suggested to me by Gordon Haigh when he was at Wolverhampton University

it can be a good task to work on following a consideration of (interior) angles in regular polygons

the relationship is quite easily established (proved) for any prism and any pyramid

powerpoint: total angle sum

## No comments:

Post a Comment