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\noindent I\hskip 0pt plus 1pt\penalty 0 turn,
in the following treatises, to various uses of those triangles whose
generator is unity. But I leave out many more than I include; it is
extraordinary how fertile in properties this triangle is. Everyone
can try his hand.

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\hbox {\citin --- Blaise Pascal}
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\noindent
The area of a circle is a mean proportional between any two regular and
similar polygons of which one cir\-cum\-scribes it and the other is iso\-peri\-metric
with it. In addition, the area of the circle is less than that of any
cir\-cum\-scribed polygon and greater than that of any iso\-peri\-metric polygon.
And further, of these cir\-cum\-scribed polygons, the one that has the greater
number of sides is smaller than the one that has a lesser number; but, on the
other hand, the iso\-peri\-metric polygon that has the greater number of sides
is the larger.

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\hbox to size{\citin--- Galileo Galilei\hfil}
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