Octadecagon and 2{9/4} or two enneagrams, {18/6} is reduced to 6{3} or 6 equilateral triangles, and finally {18/9} is reduced to 9{2} as nine digons. Deeper truncations of the regular enneagon and enneagrams can produce isogonal (vertex-transitive) intermediate octadecagram forms with equally spaced vertices and two edge lengths. Other truncations form double coverings: t{9/8}={18/8}=2{9/4}, t{9/4}={18/4}=2{9/2}, t{9/2}={18/2}=2{9}. The regular octadecagon is the Petrie polygon for a number of higher-dimensional polytopes, shown in these skew orthogonal projections from Coxeter planes: Octadecagon An octadecagon (or octakaidecagon) or 18-gon is an eighteen-sided polygon. A "regular octadecagon" has a Schläfli symbol {18} and can be constructed
Both Sides of Time Both Sides of Time Both Sides of Time (1995) is a fiction book and the first of the Time Travelers Quartet series by Caroline B. Cooney. It was first published on July 1, 1995. The hardcover book has 224 pages and was published on October 9, 2001 by Delacorte Books for Young Readers. In Both Sides of Time, Caroline B. Cooney gives a realistic view of the struggles women had faced in the 19th century and how far they have come in the 20th century. The dialogue of this novel contains a mixture of the English language from the use