Shaw's Civil architecture; being a complete theoretical and practical system of building, containing the fundamental principles of the art (1852)
Shaw, Edward · Boston, J. P. Jewett · leaf 308
STAIRS. 125 height insisting upon e, and c k equal to the heightinsisting upon c; join Ik,and produce it to i. Then,because of the similar triangles e i I and c i k, i e :i c : : e I: ck; that is, i c is the same part of i e thatc A; is of e I; therefore, if e / be double of c k, e i willbe double…
Architecture · Building
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