The complete measurer; or, The whole art of measuring .. (1789)
Hawney, William · London : Rivington · leaf 134
r lefs orgreater than a Semicircle. To iind the Area or fu-perficial Content thereof, this is rhe RULE. Multiply half the Arch Line by the Semidiame-ter, and the Product is the Area. Let ADBC be the Senior of a Circle given, whofeSemidiameter AD or BD is 24.5, and the Arch LineACB (by the Second… … 17639<a Subtrsihi 45.6 Arch Line«777 Half. 1140 5^8.60 the Area* >^gain : Let LMNO be a Sedor greater than «Semicircle, whofe Semidiameter I,0 or NO is 20.6,and by the Rule, Pag. 112, half the Arch, or M r N,is found to be 42.333 ; which, multiplied by 20.6,the Semidiameter, makes 872.0598…
Measurement · Geometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
