Page 56 - Key Stage 3 Geometry

The heptagon: although there
is another heptagon in the

centre which is surrounded by
equilateral triangles, there are

also irregular quadrilaterals
which make up another

heptagon
The octagon: like the

heptagon, has two inner
octagons, in the centre made

up of triangles the second
made up of equilaterals.

The nonagon: reducing the
number of connecting lines,

you can see the number of
triangles and equilaterals with
an irregular nonagon in the

centre. If you look carefully
you can see three large

triangles connecting the
vertices.

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