Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 149
ement from a given figure, then caand hd will represent corresponding measurements of similarfigures, the combined area of which would be equal to the areaof the given figure. Also ca would represent the measurementof a figure, the area of which would be the difference betweenthe areas of two… … Fig. 254. difference of the similar figures represented by the correspondinglines ab and ca. Note.—These similar figures may be of any conceivableshape. CHAPTEE XI INSTRUMENTS FOR MEASURING ANGLES, ETC. A protractor is an instrument used for measuring or setting offangles; it may be either…
Geometrical drawing
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