Hicks' Builders' guide, comprising an easy, practical system of estimating material and labor for carpenters, contractors and builders (1907)
Hicks, I. P. (Isaac Perry), b. 1856 · New York, David Williams company · leaf 42
y regular polygon maybe found by drawing lines from all of its angles tothe center, thus forming triangles of equal areas,which may be estimated by multiplying the base byone-half the altitude, as shown in Fig. 41. To describeany regular polygon draw the circumference of a cir-cle ; divide the…
Carpentry · Building
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
