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Jimmel - A Polygon with four or more sides with one tagged side. The tag is on a line and not on an angle. Within the jimmel there is a line between two verticies and all of the sides are straight lines.
Dibble - A polygon made up of straight lines where one side is a mirror image to the other. The two sides are separated by a arc-line-arc. If the polygon has equal sides but is not separated by a arc-line-arc then it is not a dibble. All of the sides in a dibble are straight lines.
)---------------( = arc-line-arc
I think that it is silly for teachers to encourage children to make up words in fifth grade. Especially when I am encouraging my son to look everything up. How foolish would he have felt if I sent him on a search for this definition?
Anyway, on the topic of made up words... Frindle by Andrew Clements is a book that my son enjoyed.
