Hi, any recommendations for books suitable for a 4 year old that cover more advance shapes such as dodechahedrons, scalene triangles vs equilateral etc. The library keeps handing me ones with ovals as the advanced shape, or how to build a hexaflexagon, which I have to say we are not quite ready for.
Also books on the more advanced colours such as indigo, rose, etc - would I be better getting a colour chart from the paint shop? The only ones I have seen have got the made up factory names
Hi I'd be interested in this also. I have a 3 year old who is also obsessed with shapes. At the moment he wants to know the names of every shape with sides up to 20 so far. Although he has been talking about 100 sided shapes if there is such a thing :) I have found some printables on the enchanted learning site which may be of use in the absence of a book. Hope this helps, report back if you find anything also :)
After a certain size** you just call them n-gon where n is the number of sides so the 100 sided shape is a 100-gon (see http://www.mathwords.com/n/n_gon.htm )
(** I don't know when )
Wikipedia has a good section on polygons which is quite interesting to introduce because most kids only see regular ones i.e. all internal angles are the same size, all side lengths are the same.
I don't think there is any limit on the number of sides of a polygon but you may like to introduce the idea that a regular polygon becomes indistinguishable from a circle as the number of sides increases.