introduction to pythagoras

a ppt is here

skew squares

complete the squares and work out their areas
in terms of a single unit square

complete the squares and work out their areas

external dissection

internal dissection

a simple case

cut up the squares so that you can see that the area of the larger square is the sum of the smaller two

acute triangles, right angled triangles and obtuse triangles

what relationships hold beteen the areas of the squares for each case?